Feature: This product does not have a USB port, so it cannot be connected to a computer 1. Dual-channel AIS and GPS receiver for fast acquisition and update of targets. 2. With small size and light weight, the receiver is easy to carry and use. 3. The integrated AIS receiver ensures your safety at sea by providing all the data you need for situation awareness and collision avoidance. 4. The receiving distance is long, the receiving distance is about 28 nautical miles, maximum range guarantees navigation safety. 5. Manufactured from premium ABS materials for a long service life and stable performance. Specification: Conditon: 100% Brand New Item Type: AIS Receiver Material: ABS Color: As Pictures Shown Working Current: <120ma Receive Channel: 162.025 MHz and 161.975 MHz Modulation Method: Gmsk Receiving Sensitivity: Better than -103dbm 20%ber Antenna Port: SMA connector (1 for GPS, 1 for AIS) Data Port: Nmea 0183, rs232, rs422, usb, 38400 bps Output: GPS, RMC, VTG, GGA, GLL, GSA, GSV AIS: VDM Working Temperature: -20- 55 Package List: 1 x Receiver 1 x GPS Antenna Product manual (if you need the electronic version, you can contact me)