ChinaMiniWalkieTalkie M119 Hot Sale Super Mini Portable UHF 400MHz~470MHz Radio with Type-C Earphone Set of 2 Item No. M19 Message switching In the startup state, press [PWR] once to broadcast the current channel number, indicating that the channel switchover mode is entered. Press [UP]/[DOWN] to adjust the channel in ascending/descending cycles. During the adjustment, the voice broadcasts the current channel number in real time. After the adjustment, press [PWR] again to exit the channel adjustment mode. In channel adjustment mode, the channel will automatically exit if the channel is not adjusted for more than 10 seconds. GENERAL Frequency RangeUHF: 400~470MHz Operating Voltage3.7 V Number of Channels16 Channels Inner AntennaPhosphor Bronze Infra-acousticAdjustable Non-standard Infra-acoustic Communication Distance2~3KM Charging InterfaceUSB Charging Current350MA Earphone JackType-c Dimensions (mm)17 (W) x 23(D) x 80 (H) Weightabout 0.03 Kg TRANSMITTER Output1W Current0.5A Modulation Frequency Offset鈮?KHZ Modulation Distortion鈮?% Stray鈮?.5uV (58dB) RECEIVER Receive Sensitivity鈮?.25uV Receive Distortion鈮?% Audio Power0.5W Receive Current0.5A Standby Current70MAChinaMiniWalkieTalkie website:http://www.sifang-radios.com/two-way-radios/mini-walkie-talkie/