IP68 immersion waterproof rating The doorbell will not fail even on , no need to worry about rain Loud volume and silent mode The doorbell can be heard from any corner of the 4-story villa 4 levels of volume can be adjusted, silent mode can be adjusted during lunch break 38 chords to switch freely Pleasant ringtones The transmitter is easy to press The transmitter has been tested for 20W presses The elderly and children can easily press the transmitter Unique technology, the transmitter is designed for wireless doorbells that do not require electricity. No batteries are required, which is convenient, energy-saving and environmentally friendly. Plug Type: EU Plug,it applies to Indonesia, Germany, France, Spain, Italy and so on. Voltage: AC220V Colour:Black Material:Plastic Package Contents: 1x transmitter 1x receiver 1x double-sided tape 1x Instructions in Chinese and English 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.