Willkie Talkie Model: Beefing BF-888S; 16 channel; Each radio has a earpiece. High Illumination Flashlight. PC Programmable Frequency Range: 400-470MHz; Low battery alarm; 50 CTCSS/105 CDCSS. Operating Voltage: 3. 7 V 1500mAh Li-ion battery; Low Voltage Alert; Intelligent Charging; Voice Scramble & Encryption Power-saving features to extend battery life; CTCSS/DCS function/Scanning function/Emergency alarm function Range up to 3 miles (5 km) depending on and terrain