Specifications:
Voltage of plug-in Receiver: AC 110V ~ AC 220V 50Hz/60Hz
Voltage of battery type receiver: DC4.5V(3*1.5V AAA batteries)
Power consumption of receiver:0.5W
Rating of waterproof: IP44
Battery in button: 12V 23A alkaline battery
Working range: Over 900 feet in open air;100~500 ft w/ Metal Security doors and Walls
Selectable ring tone: 52 pieces
Volume range: 30-110dB 4 levels
Expandable(Yes or No): Yes
Working temperature: -30- 70

Package Includes:
1 x Push Button (Transmitter)
1 x Plugin Chime (Receiver)
2 x Screws
1 x Double-Sided Adhesive Tape
1 x 12V A23 Alkaline battery for transmitter
1 x User Manual

Products Advantages:
Housing:Designed by top fashion master to meet the market;
Distance:The wireless distance achieve 280-300 meters, better materials keep stable transmitting range;
Stability:Guarantee quality. Products adopt excellent inner materials that keeps itself from getting higher temperature & interference;
Certifications: All products passed CE, FCC, RoHS approval.

• Wood grain low power consumption environmental protection wireless doorbell; No Batteries Required for Receiver
• Wireless doorbell operating range of over 900 feet ( in open area), you can receive the signal whether you are busy working on your computer in the home office or sharpening your culinary skills in the kitchen
• 52 ringtones(16 chord)to choose from and 4 steps volume control(25~110dB),easy to choose your change and select your favorite ringtone with forward and backward button
• IP44 Waterproof/Dustproof Portable Door;Approved with CE,FCC,RoHS certification
• Easily plug receiver into an electrical outlet (no batteries required for main receiver).High quality for you to have one, as it is more sensitive, more stable, and power effective

Wood grain low power consumption environmental protection wireless doorbell; No Batteries Required for ReceiverBluelasers