Rated input: 5V/ 1A
Rated current: 3.5mA（when the buzzer goes off）（测试中，暂定）
Rated power: 12uW（测试中，暂定）
Volume: about 80dB
Battery life: over 3 months (if use 15 times a day) （测试中，暂定）
Connection method: Wireless 5.0
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