Brand: Type: Doorbells Model Number: V018F Doorbell Type: Power Supply: AC, battery DIY Accessories: Electrical Chimes: 38 pieces Range: 300 meters in open area Volume: 3 levels Transmitter Power Source: 12V23A alkaline battery (battery not included in the product list) Receiver Power Source: AC 110/240V plug-in Waterproof IP 44 This doorbell can be used in offices, hospitals, factories, restaurants or wherever you need. Receiving range of 300 meters (in open area), stable quality is perfect for homes, hotels, schools and other areas. The button cannot be placed on a metal door as it interferes with the signal. Just plug the receiver into an electrical outlet and press the button can be attached to the door using the included double-sided tape. Contact Type: EU contact, applicable for Indonesia, Germany, France, Spain, Italy, etc. Color: Black Material: Plastic Size: Transmitter: 77 * 46 * 20mm Receiver: 95 * 65 * 24mm Packaging Contents: 1x Doorbell Transmitter 1x Doorbell Receiver 1x Double-sided Tape 1x 12V 23A Alkaline Battery 1x Screw Only the above packaging contents included; other products are not included. Note: 1. Allow 1-3 mm tolerance due to manual measurement. Please ensure you have no objections before placing a bid. 2. Due to differences between screens, the image may not reflect the actual color of the product. Thank you!