Kit included: 1 switch receiver box, 2 water resistant remote control key fobs, included battery
Physical dimension:

remote  2-1/4" x 1-3/16" x 7/16"

receiver box 2" x 1-7/8"  x 1"
How does it work:

press "on" to turn on switch, it will shutoff automatically in 5-minute range (-/+ 3 seconds), or press "off" to manually shutoff switch during count down 
Remote range: ~80ft

(remote range and signal strength varies depend on how device is setup, battery strength, interference, etc..)

power input: 12V DC with minimum 500mA 
relay output: 12V DC

max. relay current: 15A
standby current: 4.5mA

operating temp: 0~135f

other auto shutoff switch offered:

30-seconds (item# 401683074370)

1-minute (item# 401078127424)

2-minute (item# 352564889596)

10-minute (item# 352564898649)