4 Pack BAOFENG UV-5R Dual Band UHF/VHF Radio Transceiver W/Upgrade Version 3800mah Battery With Earpiece - Built-in VOX Function, 136-174 / 400-480MHz Frequency Range: 136-174 / 400-480MHz. Dual-Band Display, Dual Freq. Display, Dual-Standby. Output Power: 4 /1Watts. 128 Channels50 CTCSS and 104 CDCSS. Built-in VOX Function. 1750Hz Brust Tone. FM Radio (65.0MHz-108.0MHz). LED Flashlight. Large LCD Display. Hight /Low RF Power Switchable. 25KHz/12.5KHz Switchable. Emergency Alert. Low Battery Alert. Battery Saver, Time-out Timer, Keypad Lock, Monitor Channel, Channel Step: 2.5/5/6.25/10/12.5/25KHz, ROGER SET