GE Security NX-470 Button Keychain Touchpad (New, Old Stock)
Specifications Power source 12 V, 33 mAh alkaline battery Frequency 319.5 MHz. (60-659-43-EUR) Dimensions L = 2.30″ x W = 1.45″ x H =. 48 Typical battery life 5 – 8 years Operating temperature range 10° to 120° F.