This wireless doorbell is characterized by waterproof, which enables it to be used normally in rainy days and highly humid environments. It is easy for you to install it conveniently with no wiring required, which is money-saving and labor-saving, free moving.Designed with built-in stereo speaker, this wireless doorbell can achieve clear sound to bring you excellent usage experience.Made of high-quality plastic material, it is lightweight and durable to use.The length of this product is 9.1cm, the width is 5.9cm and the height is 2.5cm.Its main advantages are long-distance transmission, strong penetrating power, strong signal penetrating power, which can be used in office buildings, home shops, factories and other occasions.Item Name: Wireless DoorbellMaterial: PlasticPlug Type: US Plug, UK Plug, EU PlugGear Position: Four Gears Adjustable (can be Silent)Music Selection: 36 SongsTransmitter: Press with Indicator Light to Light upTransmitter Battery: 1 x 12V23A Battery (Included)Receiver: Plug in and the Bell will Ring and the Light will be onReceiver Voltage: AC110~240VWorking Range: 300M in a Straight Line on the Open GroundScope of Application: Office Buildings, Homes, Shops, Factories, etcFeatures: Adjustable, Wireless, Strong SignalSize Details: 9.1cm x 5.9cm x 2.5cm/3.58" x 2.32" x 0.98" (Approx.)Notes:Due to the light and screen setting difference, the item's color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 x Receiver1 x Transmitter1 x Double Side Sticker2 x Screw1 x Doorbell Sticker