Transmitter Solutions Firefly3 Manual page 2

Operating frequency : 318 MHz
Number of buttons : 1
Battery : 1 ea. 12V A23
Operating temperature : -20°F - 85°F
Overall dimensions : 1-1/2 x 2-1/8 x 3/8 inch
Weight: 1 oz.
Black Case with Tan Button
Case
Notch
Screw