Keep the device dry. This unit is not waterproof or water-resistant.
Sub-audible tones prevent you from hearing unwanted transmissions on shared frequencies. Press and navigate to the CTCSS (TX or RX) options. Press MENU to enter the setting. Select your desired tone frequency using the arrow keys. Press MENU to confirm, then EXIT . Storing Frequencies to Memory Channels Switch to VFO Mode . Dx-ar-8108 Radio User Manual
Located on the side panel for connecting to standard wall outlets. Headphone Port: 3.5mm auxiliary port for private listening. Initial Setup and Powering Options Keep the device dry