The E-Lock is an electronic combination lock that is controlled by your cell phone. The E-Lock picks up, using the onboard microphone, the tones generated when the keypad of a cell phone a pressed. When the correct combination of keys has been pressed, the E-Lock's 1 amp integrated relay is activated. The relay can be connected to a solenoid (not supplied), or other device, controlling the lock on a door or enclosure.
Specifications:

1. power supply: 9V battery (not incl.)
2. dimensions: 100 x 50 x 17 mm / 3.4 x 1.9 x 0.7"