Always finding it difficult to provide maintenance for your doorbell? You rather do without, yet when someone knocks on your door, you cannot hear them. Fret not, this battery-less doorbell with a long lifetime is here to stay! Just plug in the adaptor and VIOLA!
- Long lifetime - 20 years no need to change battery!
- Connectivity lasts till 150m far
- One adaptor capable of connecting to more than one doorbell
- Strong penetration - can penetrate through 3 metal walls and 3 brick walls and still work!
- Waterproof design - can work under -40degrees environment and under rainy environment
- Doorbell - 2.6cm x 4.4cm x 7.9cm
- Adaptor - 3cm x 4.9cm x 7.9cm