1. Material: ABS, PC 2. Voltage: 12/24/220V 3. Working method: whistle 4. Degree of protection: IP54 5. Volume: 120dB 6. Power: 1W 7. Installation method: wall-mounted installation 8. High decibel transmission, clear and bright sound 9. Waterproof and dustproof design, can be used outdoors in rainy days 10. Size: about 6.2x4.7 cm/piece 11. Alarm principle: power-on alarm, warning by sound
1. 材质：ABS、PC 2. 电压：12/24/220V 3. 工作方式：鸣笛 4. 防护等级：IP54 5. 音量：120dB 6. 功率：1W 7. 安装方式：壁挂安装 8. 高分贝传播，声音清晰明亮 9. 防水防尘设计，户外雨天也能使用 10. 尺寸：约6.2x4.7厘米/件 11. 报警原理：通电报警，以声音形式警示
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