Resonance zaus: 3.1 ± 0.4KHzKev khiav hauj lwm voltage: 4-7VDCRated voltage: 5VDCKev siv tam sim no: 30mA Max.at Rated VoltageLub Suab Siab: 80dB Min ntawm Rated Voltage ntawm 10cmTone Nature:Tsis tu ncuaKev khiav hauj lwm kub: -40 ~ + 85 ° CLuj: 1gKhoom siv tsev: PPOLoj: