Features: Sturdy, compact design Rear time - set knob Clip on hanger Precise quartz crystal High stability 2-year warranty 3-post lengths for different face thicknesses Specifications: Uses one AA battery, not included Rated voltage: 1.5V DC Operating voltage range: 1.2V to 1.7V DC Motor: stepping and self-starting Operating temperature range: -10C to +50C 10 mm shaft thickness, fits standard 1?2" hole in clock face 2 1?8" high x 2 1?8" wide x 1?2" thick Includes: Rubber cushion Hanger Brass washer Mounting nut Cap nut and gold color hour, minute and sweep second hands Brass Bushing Length: 13/16" Total Post Length: 1 1/8" Fit Faces Up To: 3/4" Thick