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

Material:Plastic Quantity:2pieces with 2 mounting holes for screw fixing Size:Body size:34 x 17x 15mm / 1.3" x 0.7" x 0.6" (L*W*T).Wire length:10cm/3.94" The electronic buzzer will make a loud and continuous tone when powered.The sound above the engine can be heard from a few feet away.Widely used in computers,printers,copiers,alarms and other electronic products as sound devices.

• Secure.The electronic buzzer will make a loud and continuous tone when powered.The sound like a car alarm.The sound above the engine can be heard from a few feet away.Loud enough for the dogs to hear.If used indoors they are loud enough,work great as a door chime.Fairly loud to act as a good audible warning device.Very loud at 12VDC or 3VDC.
• Work well over the rated voltage range.If you think it's better to have a lower voice,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 works great as a replacement piezo speaker to 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 warning on small equipment.Use them as temp and oil pressure alarms on the boat.
• Easy to wire them in circuits,drive from TTL or other low voltage application.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