Wireless Entry Alert Door Chime for Shop Store Entrance
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1. 8 pieces of ringtones for option.
2. Energy-saving circuit design, battery's lifespan is more than 2 years.
3. Powered by three AA batteries.
4. When someone is approaching or passing by, optical-induction components in the unit will sense optical change and send out pleasant ringtone to indicate that there is someone coming.
5. Wireless, no cabling trouble, easy installation.
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