Feature:* This mini electronic beeper support DC 5V power supply and produce continuous high-decibel alarm sound up to 80dB. * Just connect to to any power supply from DC5V. Complete drive circuit incorporated for direct operation from DC power source. * Widely used in the modification, DIY electronics reminder projects or other area needs sound alarm. Specification:* Name: Passive Buzzer* Rated Voltage: DC 5V* Max Rated Current: 5mA* Mini Sound Output: 80dB* Response Frequency: 4000+/-500Hz* Operating Temperature: -20C to 70C* Total Size: 10mm x 17mm(H*D)* Material: ABS Package included:* 5 Pcs x Passive Electronic Alarm Buzzer