ChinaTwo-WayRadios 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...