Always get alerted when someone is at the door with the SadoTech wireless doorbell system. Thanks to its battery-operated receiver, you can carry it along with you in your home or property, so you'll never miss a visitor. Plus, with the door and window sensors, you'll be alerted if your doors or windows are being opened. From SadoTech.
- Includes SadoTech wireless doorbell water-resistant transmitter with 1 alkaline battery, plug-in receiver, portable receiver, and door/window alert sensor with lithium battery
- 500' indoor range
- Four adjustable volume levels
- 52 chime choices
- Portable receiver requires 3 AAA batteries, not required
- CE listed; 1-year Limited Manufacturer's Warranty