PUI Audio AI Waterproof Piezo Buzzers are 12V constant tone audio indicators with IP67 ratings and various frequency configurations. These buzzers can be powered by 6V-18VDC power sources and feature constant tones ranging from 2800Hz to 5000Hz. PUI Audio AI Piezo Buzzers and Audio Indicators have a current rating of 35mA at 12VDC and produce an 80DB audio level.