Description :

1. Buttons: 4.
2. Radio code: hopping, with 7.3 X 1019 combinations.

Specification :

1. Battery: CR2032 button cell, 3V. 2. Estimated battery life: 4 years (@actuated 4 times / day). 3. Size: 40.5 x 55.0 x 12.7 mm. 4. Weight (w/battery, w/o key ring): about 18g.

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