Feature: 1. Dual Channel: AIS transceiver has two TDMA receivers, which could receive data in two independent channels at the same time. One TDMA transmitter transmits in two independent channels alternately. 2. Multi Function: CSTDMA function can avoid and solve communication conflict. With external serial data interface (RS 422, RS 232). Transmit and receive safety message, equipped with SOS safety button. 3. 3 Modes: AIS transceiver supports three operation mode: Carrier sense mode, assigned mode and polled mode. 4. GPS Receiver: Internal GPS receiver, can be connected to all devices compatible to GPS and PC, PDA, ECDIS, RADAR, etc. 5. Alarm and Indication: AIS receiver supports DSC reception based on TDMA channel, with alarm and LED indication for power, error, time out, status, more practical. Specification: Item Type: AIS Transceiver Material: Metal Transmission Power: 33±1.5dBm Operating Frequency: 156.025-162.025MHz Channel Bandwidth: 25KHz Channel Interval: 25KHz Modulation Mode: 25KHz GMSK (AIS Reception and Transmission), 25KHz AFSK (DSC Reception) Bit Rate: 9600b/s+50ppm (GMSK), 1200b/s+30ppm (FSK) Receiving Sensitivity: Less Than -107dBm Error Rate: Less Than 20%. Package List: 1 x AIS Transceiver1 x Connection Cable2 x Fuse