DEMO · Test inventory and test orders only. No real payment or shipment. 演示库存与订单，不扣款、不发货。
- Color: Black
- Material: ABS + Copper
- Specification: Rate voltage: 12V; Max current rating: 3.5mA; Min. sound pressure level: 85dB; Frequency: 2800+/-500Hz
- Features: Can be used with magnentic lock , Electric Strike etc.
