![em-trak B921 Class B AIS Transceiver - 2W CSTDMA [430-0001]](https://cdn.shopify.com/s/files/1/0855/3916/0358/files/98701XL.jpg?v=1706863115)
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Description
em-trak B921 Class B AIS Transceiver - 2W CSTDMA [430-0001]B921 Class B AIS Transceiver 2W CSTDMA **As the FCC requires all units sold in the US to be programmed by a qualified technician. Please submit the form below for programming at the time of purchase. A copy of the MMSI registration or FCC Ship Station License is required along with the vessel master or owner's signature on the completed programming form.** Click here to download form. The B921 is a 2W CSTDMA Class B AIS transceiver, delivering em
B921 Class B AIS Transceiver - 2W CSTDMA
**As the FCC requires all units sold in the US to be programmed by a qualified technician. Please submit the form below for programming at the time of purchase. A copy of the MMSI registration or FCC Ship Station License is required along with the vessel master or owner's signature on the completed programming form.**
The B921 is a 2W CSTDMA Class B AIS transceiver, delivering em-trak's advanced performance and reliability through next-gen technology. Small and durable, this trusted transceiver processes all AIS transmissions in real-time, even at the range limit, so you always have the complete picture and the time to respond.
em-trak's intelligent connectivity means the B921 can be connected to any chart-plotter and comes equipped with integrated GPS technology and best-in-class, ultra-low power consumption. Installation is also simplified with our unique FLEXI-FIT® bracket system to have you up and running in no time at all.
Features:
- Certified AIS Class B – 2W CSTDMA
- Global certification - USCG / FCC / Canada / Europe
- SRT-AIS™ Transceiver Engine for superlative proven performance
- FLEXI-FIT™ bracket system for easy, convenient, and secure installation
- Internal high-performance GPS receiver and antenna (external antenna optional)
- Water, pressure spray, and damp proof (IPx6, IPx7 certified)
- Protected from vibration, shock, and extreme temperatures
- Small and lightweight
- Ultra-low power consumption – best in class
- NMEA 0183 & NMEA 2000
- Automated health and performance monitoring
- Silent mode (transmit-off) function
- Enhanced RF screening to protect against electromagnetic interference
- Built-in power surge protection
Physical & Environmental Specifications:
- Size (H x W x D): 150 x 115 x 45mm
- Weight: 375kg
- Operating temperature: -25°C to +55°C
- Storage temperature: -25°C to +70°C
- Ingress protection: IPx6 and IPx7
Electrical Specifications:
- Supply voltage: 12V or 24V DC
- Supply voltage range: 9.6V - 31.2V DC
- Average current (at 12V): 135mA
- Peak current: 2A
- Average power consumption (at 12V): 1.6W
- Galvanic isolation: NMEA 0183, NMEA 2000, VHF antenna port
Connectors:
- VHF antenna: SO-239
- GNSS: TNC
- Power: 12-way circular multipole
- NMEA 2000: 5-way Micro-C connector
- USB: USB Micro-B
Data Interfaces:
- NMEA 0183: 2 x bi-directional ports
- NMEA 2000: NMEA 2000 Ed 3.101, LEN=1
- USB: PC virtual com port for NMEA 0183 data
Standards Compliance:
- AIS standards: IEC 62287-1 Ed. 3, ITU-R M.1371.5
- Product safety standards: EN60950-1 2006 +A11:2009 +A1:2010 +A12:2011 +A2:2013 EN62311:2008
- Environmental standards: IEC 60945 Ed. 4
- Serial data interface standards: IEC 61162-1 Ed 5.0, IEC 61162-2 Ed 1.0
- NMEA 2000: NMEA 2000 Ed 3.101
- GNSS performance standards: IEC 61108-1 Ed 2.0, IEC 61108-02 Ed 1.0
GNSS:
- Systems supported: GPS, GLONASS, BeiDou, Galileo (two of any combination, three including GPS, Galileo)
- Channels: 72
- Internal/external antenna: Internal or optional external antenna
- Time to first fix from the cold start: 26s
VHF Transceiver:
- VDL access scheme: CSTDMA
- Operating frequency: 156.025MHz - 162.025MHz
- Channel bandwidth: 25kHz
- Receivers/transmitters: 2 x receivers, 1 x transmitter
- AIS receiver sensitivity (20% PER): -111dBm
- AIS transmitter power: 2W (+33dBm)
User Interface:
- Indicators: Power, transmit timeout, error, silent mode
In the Box:
- 1 x AIS transceiver
- 1 x Power and data cable (2M)
- 1 x FLEXI-FIT™ mounting bracket
- Complete with screws & optional fixing tape
Specifications:
- AIS Class: B
- Antenna Included: Yes
- Display Included: No
- Function: Receive/Transmit
- GPS Included: Yes
- Box Dimensions: 6"H x 7"W x 8"L WT: 1.55 lbs
- UPC: 672975210502
Quick Guide (pdf)
Brochure (pdf)
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.4 ★★★★★
Based on 8 reviews
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Product Reviews
★★★★★ 5
Works Perfect, No Installation Needed, Perfect Size, and Wonderful Price!
Several months ago when the keys on my laptop mouse pad started to go out, I was really irritated because I have gotten so used to using the mouse pad that I was worried that I wouldn't be able to work as efficiently using a wireless mouse. I knew that it would only be a few days before the keys got to the point that I wouldn't be able to use them and started looking on Amazon for a wireless mouse that I might possibly be able to stand using on a daily basis. I spotted the AmazonBasics Wireless Mouse and thought that it wouldn't be that great because it was way cheaper than most of the other wireless ones that I could find. I went ahead and placed my order because I needed something and thought that if it didn't work that well, I wouldn't be out of that much money. When it arrived, I was happy to see that it was a tad bit smaller than other ones that I have used with desktops in the past since I have small hands. I opened the package, popped in some batteries, plugged the nano receiver into my USB slot, and it was working instantly. I thought that it would take some time to install ( I did not read much on it when I purchased it honestly, I just needed one quick!), but was SO happy to see that it needed nothing to be installed. I have been using this wireless mouse for about a year and half now and I have recommended it to SO many people who were looking for one. I work at home on my laptop 7 days a week and anywhere between 12 - 18 hours a day. I only have to change the batteries about once every two months (sometimes it will go a little longer and sometimes a little bit less - not sure on why though). This mouse has worked flawlessly since the day of purchase and I was SO wrong to think that because it was cheaper than the others that it wouldn't work as well. There has never been a time where it disconnected from the computer or that there was any issue using it. A few times when it has needed the batteries changed and I wait a few days, there is a tiny lag - but that is all my fault. The AmazonBasics Wireless Mouse has a little red indicator light that lets you know when the batteries are getting low and need to be changed. I like that feature so that I'm always aware of when they need to be changed. Since I travel a lot, this mouse is great because it doesn't take up a lot of space in the laptop bag. I also never have to worry about losing the nano receiver because once you remove the little door to the battery area, there is actually a space that the nano receiver clicks into making it perfect for travel. If you are in the market for a great wireless mouse, I would recommend the AmazonBasics Wireless Mouse because it has been through over a year of my all day, everyday use and still works just like the day that I purchased it!
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Reviewed in the United States on September 3, 2015
★★★★★ 5
Click
Great, cheap, practical, simple to use, what more can you ask for.
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Reviewed in the United States on May 14, 2026
★★★★★ 5
Great Mouse
I normally use the Logitech M325c. I've gone through dozens over the years. It works very well, but they seem to wear out fast; the wheel scroll is what fails. I decided to give the Amazon Basics a try. So far, it looks, feels, and functions the same as the Ltech; it doesn't have the fun colors, but if it holds up longer than a year, it's a fair tradeoff. I will revise this review if things change in the future, but as of now, I would recommend the Amazon Basics and will replace the other Ltech's when the time comes.
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Reviewed in the United States on May 7, 2026
★★★★★ 5
Awesome quality mouse
Fantastic value. First it feels like a quality mouse and works like a mouse 3-4x the price. It is solid and has nice weight to it, not like some of the flimsy competitors. I am buying another just to have.
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Reviewed in the United States on May 26, 2026
★★★★★ 5
Quiet, Comfortable, Convenient
Color: Purple, Color: Purple
I ordered both this mouse and the Proto arc because they are budget friendly and both have good reviews. Not much sets them apart, both are great options! This Seenda is slightly larger which I decided was best for what I need. (Hands 6.5in x 3.5in) Quiet, smooth, similar weight and feel when moving around. Similar control on the screen as well. Both incredibly easy to pair with my Macbook. I ended up choosing this one because I love the colors and I like the knob that turns the volume up and down. They both have buttons that when clicked, go back a page, or go forward a page. I will update my review if it is not durable.
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Reviewed in the United States on May 4, 2026