SDM Wireless Digital Door Bell

الوصف

FEATURE •Patented technique of lowest radiation to ensure CE approval even with long distance. •Anti- interference digital technique. ****3 different codes. •Radio technique. Even if the transmitter is put on the iron door, the receiver can still receive the signal from the transmitter. •IP*4 waterproof transmitter. •Working distance is more than *0m. •Different melodies for option. •Energy-saving technique. 3×LR6 batteries of receiver can work for around 6 months and battery for transmitter for around 2 years. •8 different chord melodies or *6 different melodies for option. TECHNICAL DATA •Transmission: radio. •Frequency: **3.*5MHZ～**4.*9MHZ or **5MHZ •Transmitter power:<5mw •Current consumption while not working < 0.*5mA •Loundness level: *0 dB •Code number: ****3 •Battery required DATTERY REQUIREMENT •Bell push*1×*2V alkaline battery (*3A). •Door chime*3×AA alkaline batteries(Lr6). •Averagely three times a day, 5s a times, battery. •Lr6 can be used for nearly 0.5 year, battery *3A can be used for more than 2 years.