Sonicrest 6v and 12v low profile electromagnetic buzzers sonicrest hcm1212bx the sonicrest hcm1212bx is a 12v electromagnetic low profile buzzer unit that has a sealed structure and is washable and compatible with wave soldering suitable for a wide applications such as multi tone audio signals eg gsm mobile phones and pagers pdas automotive domestic appliances portable equipment medical devicesa and computer motherboards sonicrest hcm1212bx low profile buzzer 12v