The doorbell can be used in offices, homes, hospitals, factories, restaurants, or anywhere you need it. The receiver can be freestanding or wall-mounted using the included hardware. Install the push button with the included double-sided tape or screw it to the wall (screws included). 300 meter receiving distance (in open area), stable quality is perfect for villas, hotels, schools and other areas. The button should not be placed on an iron door as it will interfere with the signal. Doorbell Model: A06 Range: 300 meters in open area Volume: 4 levels Ringtones: 36 pieces Transmitter size: 77 x 46 x 20mm Receiver size: 95 x 65 x 24mm Transmitter battery type: 12V 23A Alkaline battery (Battery not included) Receiver Battery Type: 3 x AA batteries (battery not included) Waterproof grade: IP44 Color: black Material: plastic Package Contents: 1 x Doorbell Launcher 1 x Doorbell Receiver 1 x Battery 1 x Screw 1 x Double-sided tape Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. The doorbell can be used in offices, homes, hospitals, factories, restaurants, or anywhere you need it. The receiver can be freestanding or wall-mounted using the included hardware. Install the push button with the included double-sided tape or screw it to the wall (screws included). 300 meter receiving distance (in open area), stable quality is perfect for villas,