Battery holder voltage output :3V;Size :(LxWxH) /1.34"x0.94"x0.24"/34 mm x23.9mm 6.1mm

Safe and Reliable: The button battery holder has a switch function, no switch is required.Battery holder with cover, safe and anti-short circuit

Feature: The use of good quality materials and with impact resistance

Cable Diameter (measured by insulation around the wire):0.0393"/1mm;Wire Length :29cm/11.42in

Tip: Flip the front side up, the left line is positive, the right line is negative .(red line is positive, black line is negative;gold line is positive, silver line is negative)