Brand N/A Model SY359MA11 Color White Quantity 1 Power Supply AC: 110V-240V DC: 5V (EU plug) Remote Controlled distance 250m Voice Decibels > 55db Battery Type 3.7V lithium-ion Other Suitable for office hotel villa and multi-floor buildings; Functions: talking freely and clearly; Just push a button you can see the visitor and auto unlock door if you don't want to get up or move out from the chair; Push the bell can photo visitor's picture if owner is out and the owner can check after go back home; Auto wireless control; Great performance and reliability; Indoor device also can take pictures w/ built-in clock mini USB interface rechargeable battery and rings; Beautiful practical and high sensitivity; Can work for more than 2 months under energy-saving mode (calling for 20 times a day) Packing List 1 x Indoor monitor (140 x 85 x 21mm) 1 x Outdoor camera (128 x 92 x 35mm) 1 x Indoor USB charger (5V/1A cable: 100cm) 1 x outdoor power adapter (5V/1Acable: 150cm 2-round-pin plug) 1 x Lithium battery (1500mAh) 1 x Pack of screws and plugs 1 x English user manual