PUI Audio AT Waterproof Transducers IP67-rated piezo indicators, designed with 3200Hz to 4250Hz resonant frequency with lead wires. These transducers feature a maximum current draw of 10mA and 100mA at the rated voltage of 10Vpp or 28Vpp. The transducers also have a minimum SPL of 84dBA to 110dBA at 10cm and 30cm. PUI Audio AT Transducers feature wire leads for easy installation.