Cartek internal on/off push button switch. These internal push button switches are self locking on/off switches, which means they make the circuit on the first push, when pushed again they release and break the circuit. These switches are supplied with every new Cartek battery isolation kit, but have been used by customers for other applications. Very high quality switches that are IP67 rated for water reistantnce and dust sealing. They are supplied complete with attached flying leads ready for soldering into your circuits.