NOTE:The link is the software about Baofeng BF-888s software. https://s3-ap-northeast-1.amazonaws.com/sain-amzn/20/28-020-101/480+software.rar This Baofeng BF-888S 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 H-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) 110×50×32 mm Weight (with battery/antenna) 198g 170 g Communication Range about 6km Package Contain: 1xBF-888s Walike Talkie 1xCharger 1xBattery 1xbelt clip 1xUser Manual