611245 Associated 120 Minute Electronic Timer with Knob, for use in units with a 120 minute timer already installed. The timer controls battery charging in timed Mode and has a manual hold mode for longer charging cycles. Switch circuits are rated 15 amperes. Termination is designed to accept standard 1/4" spade terminals.*If your unit has an Older 90 Minute mechanical timer, use the 611254 retrofit kit to simplify the install. If your unit has an electric 120 minute timer, use the 611245 which is a direct replacement for those units.