Battery Powered - No Wiring!
The "DA48 Wireless Door Chime" is Highly Versatile

The DA48 Wireless Door Chime is  battery powered and does not require electrical wiring. The DA48 Wireless Door Chime works with a battery operated sensor at the door, whenever the door is opened it transmits a signal to a ac plug in remote receiver, within 150' feet of the door, to a receiver in a different location, thus announcing entry to your premises.  The DA48 Wireless Door Chime can only be used with a closed door.

Features:

• Not recommended for metal doors or door jams, for metal doors please look at model DA50L
• Magnetically Tripped Sensor
• You can set different transmitters to play different sounds for different doors
• Remote Receiver with Volume Control, operates on 110 V, plugs into a  wall outlet anywhere up to 150 feet of the transmitter
• Wireless - Simple Installation
• Battery Powered - 6V - Alkaline (PX28A/RC2095)
• No Reflectors
• No Light Beams
• No False Alerts
• 150' Range
• 32 Frequency Codes, reduces interference
• Choice of 6 audio presets :

1. Dong
2. Ding Dong
3. Westminster Chimes
4. "My Country Tis of Thee"
5.  "Hail, Hail! The Gangs All Here"
6.  "The Twelve Days of Christmas"

Use model DA48 if the door sensor will be indoors, use model DA49 if the door sensor will be exposed to the elements.