The Relay perc 2 is a simple module, it has a audio output for the relay that amplifies the sound of the relay via a piezo. This module is mainly designed to be a controller, but it can also make a base kick like sound.

The bottom 3 connect to the relay and can be used to switch a signal, the switch type is SPDT.

Specifications:
Module width: 20mm (4hp), power consumption: +35mA -4mA.
Gate input to opperate the relay.
Audio out with volume adjust via potmeter about 10v pp.
bidirectional SPDT switch; CO = common, NC = normally closed, NO = normally open.