1. Fashion design touch design
2. Simple and convenient installation
3. Ultra-low-power design, power-saving and durable use
4. 52 chord ringtones optional
5. 4 levels of selectable volume adjustment
6. Working voltage: AC 90-250V
7. Working frequency: 433.92 MHz+-280 KHz
8. Net weight: 92g
9. Size: 81x81x20mm
10. Volume: 10-110dB
11. Scope of application: indoor
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