Everyone is concerned about the issue：

1.Our doorbell has a design to prevent interference and The neighbor's doorbell will not interfere with our doorbell. Currently, Other less than 7 dollars doorbell may interfere with each other. (Please don't buy cheap models and eliminated technology) 2.The products sold are all in stock. Shipped within 24 hours (excluding holidays and Sundays)

Self-powered Wireless DoorBell

Our advantage 1. Please purchase SMATRUL genuine products：1 year warranty or replacement commitment. We are honest doorbell sellers 2. 4 Modes: Sound only, flash only, sound & flash, sound & light on.Light on mode can turn into a night light 3. Memory function: After the power is turned off, remember the music set before. No need to set music again 4.Gorgeous lights, loud ringtones. Especially suitable for the elderly, women, sluts.

Clear sound, no noise, loud sound

4 files volume 0-100DB Ringtones: 58 pcs Rated voltage: AC 110~ 240V, 50-60Hz

Self powered button and waterproof instructions

1.This button uses kinetic energy. No battery required.Self-powered doorbell that requires no battery,Don't worry if the battery has power, so Won't miss important visitors 2.our button waterproof rating is IP44, the general use is no problem, but heavy rain may affect the life expectancy, we recommend the purchase of waterproof cover, so use longer and more se

Other parameters:

1. Receiving distance: 150 M (in open area) 2. Volume: 4 files 0-100DB, ringtones: 58 pcs 3. Rated voltage: AC 110~ 240V ,50-60Hz 4. Working frequency: 433MHz. 5. Receiver standby power:< 0.5W 6. Receiver size: 86X78mm 7. Button size: 80x41mm

Passed CE certification

Please rest assured to buy, 100% inspection, firm packaging

Supplementary explanation

Model: big waterproof cover 1.Not included in the list, additional purchase is required 2.you can find the link on the store home page or contact customer service .