Retevis RB639 Two Way Radio PMR446 Rechargeable USB-C Emergency Alarm VOX Handheld Walkie Talkies with Earpieces for School HotelRetail

Reliable travel partnerEmergency SOS function and durable PTT buttonsThe buttons of the Retevis RB639 ultra-thin walkie talkie have been tested for more than 50,000 keystrokes, are equipped with keylock and channel lock function prevents accidental touches; you can call your companion in an emergency.Simple operationVOX menu and hands-free functionRetevis RB639 walkie talkie has high-quality sound; clear and loud voice; equipped with VOX function, which completely frees your hands; the voice menu function is convenient for your operation.How to turn on the VOX function?Short press the menu button to select the VOX, then press [+] or [-] to set the voice control on or off. Finally press the PTT key to exit the setting.How to turn on the emergency alarm function?Long press the [-] button, the local and remote walkie-talkie alarm sounds at the same time: after 8s, the alarm sound ends, and the walkie-talkie speaker is turned on to send information; after 22s, the alarm mode exits.How to turn on the key lock function？Press and hold the menu key and the [-] key of the radio at the same time, the key lock function will be turned on. At this time, except for the [PTT] key, all other keys cannot be operated.Is it license-free 2 way radio?RB639 walkie talkie is PMR446 license free, worked directly out of the box. Need to adjust the channel and ctcss/dcs to make a call (or turn off the sub-audio).