[200M wireless range] The wireless doorbell has an ultra-wide coverage range, its wireless signal has super penetrating power, easily passing through doors of various materials or walls is not a problem, Not only that, but it never interferes with other wireless equipment.you will not miss any visitor. [Waterproof & Durability].Wireless doorbell with high waterproof performance, to withstand the worst weather conditions , ultra-low power consumption and long-lasting durability, you can install this doorbells for home,classroom, indoors or outdoors. [38 Chime & 4 Volume Levels]Pleasant 38 kinds of ring for doorbell wireless,you can set different ringtones in different place.The doorbell automatically memory your last set melody and volume level after a power outage. [Silent mode]The door bell battery powered has mute mode functionality. Free your family of disturbances during movie nights, nap times, or any moment you want privacy. [Attention on Iron Doors ]The doorbell button cannot be placed on an iron door because it has strong signal interference capabilities, which will render the doorbell ineffective. Plug Type: US Plug, it applies to Canada, India, Mexico, Thailand, Taiwan, the , the Philippines and so on. Voltage: AC110V Colour:black Material:ABS Size: Receiver size: 7.8 x 5.4 x 2cm Doorbell size: 6.6 x 4 x 2cm Package Contents: 1 x Doorbell button 1 x Receiver 1 x Double-sided tape 1 x English manual Only the above package content, other products are not included. Note: Light reflection 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.