7 inch Video Monitor and Wireless Camera Digital Door ... Speaker, Volume -/+, Brightness control -/+, Antenna, Power ON/OFF Switch , Work Light, Charge Light- Dimensions: L:102 x ... Microphone, Call button , Speaker, USB interface for charge , Power switch , ‘Pairing’ button, Indicating light for low voltage , Indicating ... with the arrow keys 7 inch Video Monitor and Wireless Camera Digital Door Phone