HAHIYO Electronic Buzzer Alarm 12V 400Hz Beep Continuous Sounder Active High Plenty Loud Tone Piezo Siren Security Audible Easy to Install with Wire for Horn Siren Alarm 2PCS

Secure. The electronic buzzer will make a loud and continuous tone when powered. The sound is similar to a car alarm. The sound can be heard from a few feet away—loud enough for dogs to hear. If used indoors, they are loud enough and work great as a door chime. Fairly loud to act as a good audible warning device. Very loud at 12VDC or 3VDC. Works well over the rated voltage range.

If you think it's better to have a lower volume, there are several ways. The first, add a little resistor or two to reduce the sound level. The second, use a simple piece of electrical tape to cover all or part of the outlet. The third, wrap the buzzer in paper towel and duct tape. Also, you can vary the voltage or use PWM to control the volume.

Functional. The beepers work great as a replacement piezo speaker for an old KMC alarm clock. Used these to extend an alarm to all levels of the house. As a replacement for a failed piezo motorcycle horn. Used these beepers for turn signal alarms on a motorcycle. Works well for malfunction warnings on small equipment. Use them as temperature and oil pressure alarms on the boat. Easy to wire them in circuits, drive from TTL or other low voltage applications. The circuit board wire bonding process is robot welding and automatic soldering. It has a beautiful appearance, no missing soldering, false soldering, and false soldering. After the wave crest, there will be no silent phenomenon due to the wire bonding problem.

The plastic shell made of high-quality ABS material is environmentally friendly, flame-retardant, anti-aging, wear-resistant, strong, and durable. The upper and lower shells are all high-temperature shells, and the circuit boards, PIN pins, and welding wires are all lead-free materials. Working voltage: 12 V DC