12 Volt Timer
The TM619 is a 7 day timer that allows up to 8 on/off functions per day.
The timer is operated by 12VDC. The output to your timed device goes through the contacts of the output relay which is rated to a maximum of 16 amps resistive at 250VAC (8 amps inductive) and 16a at 30VDC.
It has a CR2032 lithium battery that lasts for approximately 2-3 years. The battery only keeps the time on the timer correct when the power is disconnected and is not required for normal use.