This BF-888S Walkie Talkie is a great long range Walkie Talkie (handheld transceiver) for you! It can bring huge convenience for you to communicate with each other in a long range about 6km. General Product Information: Frequency Range : UHF 400-470MHz Channel Capacity: 16 Channel Spacing: 25KHz Operated Voltage: 3.7 V Battery: 1500MAh Li-ion Battery Life(5-5-90 duty cycle): About 8 hours Frequency Stability: ±2.5ppm Operated Temperature: -30°c+60°c Antenna Impedance : 50 Dimensions (L×W×H) (with battery,without antenna): 115×60×33mm Weight (with battery/antenna): 198g/170 g Communication Range: about 6km Package include: 4 x BF-888s Walkie Talkie 4 x Antenna 4 x Charger 4 x 1500mAh Rechargeable Battery 4 x Belt Clip 4 x User Manual