Frequency: 161.975MHZ/162.025MHZ Frequency interval: 25kHz Transmission power: 5W Lithium Battery capacity: 3000mAh Operating temperature:-20℃ - + 60℃ Communication range: about 10 nautical miles Bandwidth: 25kHz Modulation mode: GMSK Emission current: Less than 1.5A Operating voltage: DC7.4V Size(width x height x thickness):88 x 203 x81mm GPS data update time (adjustable) :1-30 minutes, default factory setting 2 minutes Color: Orange Material: plastic Package Contents: 2 x Marine Boat Net Position Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.