52 ringtones, 300m range in open terrain, 4 volume levels, adjustable LED indicator for the receiver. For families, commercial areas, residential areas, office buildings, hospitals, restaurants, factories. Plug type: EU plug, suitable for Indonesia, Germany, France, Spain, Italy etc. Type: Doorbells Ringtones: 52 pcs Color: Black Material: ABS DIY supplies: Electrical Doorbell type: Wireless Power supply: AC, Battery power supply: AC100-240V Working frequency: 433MHZ Ringtone: 52 ringtones Waterproof: Yes Volume: 4 levels 10-110db Battery mode: 12v 23A battery (not included) Receiving distance: 300M Remote control (in open terrain) Suitable for: Home, office, villa, hospital, school, factory The transmitter 12V23A battery factory installed (not included) Use of microprocessor control, double-sided PCB design. The frequency 433MHz, can be customized to other frequencies. Button configuration, superheterodyne learning code in code mode Double-sided stability of PCB, chip standby sleep up to -level. Package list: 1x Receiver 1x Transmitter Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The allowed measurement error is +/- 1-3cm.