280m long range wireless doorbell 38 ringtone flashing light doorbell for deaf
Price: $4.11
1. Operating frequency: 433.92MHZ ;
2. Reminder mode: ringtone+flash, ringtone, flash;
3. Power supply: 3*AAA batteries or USB cable for receiver, built-in CR2032 cell button battery;
4. 38 ring tones choices, 4 level adjustable volume;
5. Transmission distance: 280M in a open air place;
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