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Wireless flash music doorbell 1. Product Introduction Model KCDB-002 and KCDB-003 flashing and music doorbell, based on visual physiology, multi-frequency multi-color flash technology and space grating flicker stimulation technology, realize the diversification of ways to remind, such as flashing, music and vibration, which not only improve the peoples attention, but also can avoid visual fatigue and the harmful effect of visual stimulation, make the users feel comfortable. Besides the design of the button is human, there are portable and fixed types, and the operation is simple. 2. Technical Specification Model: KCDB-003 Components: transmitter and receiver Input battery: DC 12v A23, AC 220V 50Hz Rated power: 5W Output voltage of built-in plug: DC7V Environment temperature: -5~45 Package size:25.5cm×18cm×7.5cm 3. Price CIF Price: USD 30~35 per set