Main Functions Built-in GNSS Module, Support GPS, GLONAS, SBAS Satellite-based Augmentation System (WAAS/EGNOS/MSAS/GAGAN) Small Size for Easy Installation NMEA Formats (In): RMC, GGA, GNS, GLL, VTG NMEA Formats (Out): DSC, DSE, RMC, GSA, GSV Dual Receiver, Independent DSC Dedicated Receiver Manually Input GPS Latitude and Longitude and Time IPX7 Waterproof Construction (1m Depth of Water for 30 Minutes) Speaker Vibration Draining Function Weather Channel Alarm Dual/Tri-watch Functions Scan: Normal Scan and Priority Scan DSC Call Reception and Transmission Records Can be Queried Standard NMEA Interface (RS-422 Protocol) Full Dot Matrix Display Channel Number Display Digits Selectable: 3 Digits(01B)/ 4 Digits(2001) Simple Combination of Arrow Keys and Programmable Soft Keys for Smooth Operation Support Latest Marine Channel Standards and DSC Protocol Standards. DSC Distress Cals in 11 Categories,All DSC Calls in 3 Security Categories

 Specifications
　　Frequency: TX: 156.000-162.000MHz, RX: 156.000-163.425MHz
　　RF Power: 25W/1W
　　Channel Group: USA,INT,CAN
　　Modulation Mode: 16K0G3E(FM), 16K0G2B(DSC)
　　Frequency Stability: ±5ppm
　　Power Supply: DC13.8V (±15%)
       Channel Spacing: 25kHz
       Operating Temperature: -20℃~+60℃
       Antenna Impedance: 50Ω
       Output Impedance (Audio): 4Ω
　　Dimensions (WxHxD): 155×68×86mm
　　Weight: 721g