ITEM NAME:3pcs 12V DC 85dB Mechanical Vibration Electronic Alarm Buzzer Constant Tone Descriptio n Description: Rated Voltager: 12V DC Operating Voltage: 8-15V DC Max. Rated Current: 25mA At 12V DC Min. Sound Pressure Level: 75dB At 12VDC/20cm Resonant Frequency: 400Â ±100Hz Operating Temperature: -20℃~ 60℃ Size: 3.2x1.2x0.9cm/1.26x0.47x0.35" Specifications: Type: Buzzer (Piece) Drive Method: Electromagnetic Active: Passive Material: ABS Number Of Channels: Two Channels (Stereo) 1. Low Frequency 400Hz 2. Outdoor Solar Repeller 3. Low Voltage 0.8V Starting Package Included: 3 *Â Alarm Buzzers Note: 1.Due to the manual measurement and different measurement methods, the actual size could be slightly different. 2.Please be reminded that due to lighting effects and monitor's brightness/contrast settings etc, the color tone of the website's photo and the actual item could be slightly different. We offer you what you need! 3pcs 12V DC 85dB Mechanical Vibration Electronic Alarm Buzzer Constant Tone.Type: Buzzer (Piece). Rated Current: 25mA At 12V DC. 3 Alarm Buzzers. Sound Pressure Level: 75dB At 12VDC/20cm. We want to make sure you are happy with our item. Goods without RMA number will NOT be accepted.