BaoFeng Pofung GT-3TP Mark-III Tri-Power 8/4/1W Two-Way Radio Transceiver with 7.4V 3800mAh Battery, Dual Band 136-174/400-520 MHz True High Power, Upgraded Chip + High Gain Antenna + Car Charger GT-3TP Mark-III is Upgraded version of GT-3 Mark-II with Tri-Power: High / Med / Low Power Settings (8W / 4W / 1W). Optimal SQL Setting, Optimal Modulation of TX/RX Power Tube, True 8W Output Power, Up to 11KM effective talking range. Broad (Wide) / Narrowband (Narrow), High power / low power (5W / 1W), selectable. Selectable Frequency Step: 2.5/5/6.25/10/12.5/25 kHz. Frequecy Range: 65-108 Mhz (Only commercial FM radio reception), VHF: 136-174 Mhz (Rx/Tx), UHF: 400-520 Mhz (Rx/Tx). Note: Factory defaults frequency is 140-150/430-440MHz (8W Output), please reset the radio to reach 136-174/400-470MHz or program it to reach 470-520MHz (The software is the same as GT-3 Mark-II). 128 Channels 50 CTCSS and 104 DCS, Function Busy Channel Lock "BCLO", Function "VOX" (Voice Operated Transmission), "OFFSET" (frequency offset for repeater access). Baofeng 7.4V 3800mAh Li-ion Battery for Baofeng GT-3 & GT-3TP.