1. When the walkie-talkie has been used for a long period of time, the control knob and case may easily become dirty. Remove the control knob from the walkie-talkie and clean the case with a neutral detergent (do not use highly corrosive chemicals) and a damp cloth. The use of chemicals such as detergents, alcohol, sprays or petroleum preparations can cause damage to the walkie-talkie surface and enclosure.
2. Hold the walkie-talkie lightly, do not move the walkie-talkie antenna.
3. Cover the dust cap (if equipped) when the accessory is not used.