Feature: 1. Self Generating: 86 panel wireless doorbell, integrated with other household switches, free of wiring, battery. The transmitter can be installed with stickers or screws. 2. Caregiver Pager: It is not only a doorbell, but also a pager. It is suitable for kids, the elderly and pregnant women. It is easy to operate. 3. 2 Receivers: The doorbell transmitter is IP68 waterproof. The two receivers can be used in different rooms, and separate corresponding ringtones can also be set. 4. Long Control Distance: Doorbell supports long distance signal transmission, with strong penetration, and one to one signal pairing, without fear of interference. 5. Adjustable Volume: The volume is loud, which can solve the problem that the elderly can't hear. One button mute can also be set, which is convenient for the elderly to use. Specification: Item Type: Wireless Doorbell Material: ABS Usage: It can be used in families, villas, hotels, factories, suitable for the elderly, patients, pregnant women, one button call Door Bell Transmitter: Power Supply: Self Generating Door Bell Receiver: Power Supply: AC100V-230V Power Consumption: 0.25W Ringing Tones: 38 Ring Tones Transmission Distance: Open Space ＞ 150M RF Frequency: 433MHz Ringing Volume: ≥ 50dB/1m. Package List: 1 x Wireless Doorbell2 x Receiver2 x Sticker1 x Manual Note: Please supply power according to the voltage used. Use of other voltages may cause fire and product damage!