The HT883 portable is designed to withstand the every day rigours of life at sea, with superior MIL-STD 810/C/D/E/F construction and IP68 submersibility making them the most robust and durable marine portables on the market. Utilising the latest intelligent Lithium-Ion battery technology your HT883 will display a battery cycle count each and every time you power-on your radio. For your convenience it will even alert you to imminent battery life expiration.The HT883 can be programmed all UHF on-board channels and an almost unlimited number of additional private channels in range 400-470MHz.As standard the HT883 is supplied with: • CNB850E - USTC approved 7.4v, 1800mAh rechargeable Lithium-Ion battery pack • CBH950 - ATEX approved spring loaded belt clip • High efficiency helical antenna (can be exchanged for stubby aerial at point of order) • User manual      Standard Features: • Environmentally protected to IP68 i.e. submersible to 5 metres for up to 60 minutes • Robust design, exceeds MIL-STD-810C/D/E/F • LCD screen to display programmed information •1800mAH Lithium-Ion battery for superior operational time • Full transmit power output 5Watt • 255 channels • Exceptionally loud and clear audio • 3 key entry model • Programmable buttons • Low battery alert indicates when the battery needs replacing HT2.0 Marine VHF General Features (pdf) Specifications: Frequency Range 400-470MHz (HT844) Channels 255 Channel Spacing 12.5 kHz / 25 kHz Communication Method Simplex / semi duplex Antenna Impedance 50 ohm Antenna Whip / stubby Battery Type 1800 mAh Li-Ion battery pack Power Supply Voltage 7.4V DC Microphone Internal condenser microphone Operating Temperature -20° to +55° Weight 277g with battery and aerial Size (mm) 59.5(W) x 130(H) x 37(D) W = 59.5  (62 including protrusions) H = 130 (145 inc knobs) D = 37mm (41 including battery protrusions) Current Drain, nominal: • TX 5W/1W        1800mA/850mA • RX 0.5W/STB        160mA/50mA