A standard basic quartz clock movement. The movement is supplied without hands but uses the separate hands Order Codes YU74R YU75S & YU76H. Time is set with a knob on the back. Movement is attached to face with a threaded brass boss having a shouldered brass collar nut. Specifications Crystal frequency 32.768k Hz Accuracy plusmn 0.45 plusmn 0.55sday Operating voltage 1.3 1.65 Vdc Operating temperature 10 C to 60 CAverage current 150micro A 1.5 V Battery type 1x AA not supplied Battery life approx. 1 year Dimensions 55 x 55 x 17mmnot including mountingboss & hand pivots Mounting boss 8mm dia. clear Hole dia. for collar 10mm dia. clear