Bench Top Timer Without 4mm Sockets. These stylish bench top timers are easy to use and are particularly suited for use in schools. They have colour coded buttons and clear LCD and are housed in robust ABS casing. There is choice of two models with or without contacts for external triggering (4mm sockets). Supplied complete with full operating instructions and batteries.Count up with lap and split timing features. Positive stop, start and reset buttons with bleep sound when activated. Timing Period: Up to hours, 59 minutes, 59 seconds. Resolution: 1/100 sec for 30 minutes then sec thereafter. Accuracy: Within +/- second/24hrs. Battery: x 1.5V AA battery (supplied). Dimensions: 100 90 70.5mm. LCD Size: 63.7 19.7mm.• Timing Period: Up to hours, 59 minutes, 59 seconds• Resolution: 1/100 sec for 30 minutes then sec thereafter• Accuracy: Within +/- second/24hrs• Battery: x 1.5V AA battery (supplied)• Dimensions (W D H): 100 90 70.5mm• LCD Dimensions: 63.7 19.7mm