Note: The color of the product we ship is the color in the first picture, and the specification and quantity are shipped according to the quantity and specification described in the title. If you need to change the color or style, you need to contact us within 12 hours after placing the order. We use high-quality raw materials, all materials are very suitable for the product, please rest assured to buy. Wireless Cordless Door Bell. Specifications Doorbell Type: Wireless Type: Doorbells Model Number: K01-DC Power Source: DC Power Source: Battery DIY Supplies:: Electrical Transmitter Battery Type:: 23A12V Alkaline Battery (do Not Include) Receiver Battery Type:: 3*AAA Batteries (do Not Include) Applicable Space:: Home/Office/Villa/Hotel/Hospital/Apartment Waterproof Rated:: IP44 Features : . New, High Quality ABS Material with LED Light . Simple, Wireless Installation, No Wires or Cables Required . Transmitter(remote Control) and Receiver . Waterproof Design . Anti-interference System, Avoid Interferences Between Neighbors . Adjustable Volume and 36 Different Tunes for Your Choice, Effectively Reminds You of the Coming of Guests or Friends . Long Distance Transmission and High Strength Signal and Sensitivity . Remote Control Range Up to 200m in the Open Air, Suitable for Homes and High-rise Building. Package Includes: The Battery NOT Included 1 X Wireless Doorbell Receiver 1 X Doorbell Transmitter . Products number : SM64853