Diameter is 38mm Height is 22mm 2 Mounting holes distance:40mm 2 wires, rate voltage: 12v DC, operating voltage: 3 - 24v Buzzer type: piezoelectric sound pressure level 95 Bring excitement to your game night with the Big Buzzzer! This electronic buzzer game is perfect for families, parties, and game nights. With multiple game modes and adjustable volume, the Big Buzzzer adds a fun and interactive element to any game. Whether you're playing with friends or family, the Big Buzzzer will be the highlight of your next game night."