1.After the interphone is used for a long time, press the button, the control knob and the housing are easy to get dirty. Please remove the control knob from the interphone and clean the housing with neutral lotion (do not use strong corrosive chemicals) and wet cloth.The use of chemicals such as detergents, alcohol, sprays, or petroleum preparations can cause damage to the surface and shell of walkie-talkies.

　　2.Handle the walkie-talkie gently. Do not move the walkie-talkie with your antenna.

　　3.When not using the attachment, please cover with dust cover (if equipped).