This LCD Multi-Timer is a reliable laboratory timer used in Physics and is microprocessor controlled for precise measurements. If no buttons are pressed for 2 to 3 minutes, it automatically turns off but restores all readings and memories when re-powered. This durable and efficient timer is ideal for student use, with its fast timing capabilities, low cost, and versatile functions. It cannot calculate and only runs one external circuit. However, 2 Photo Gates can be used to start and stop the timer in different modes. Brand: IEC Read Instruction Sheet Product Code: SE.LB4057-001 Brand: IEC Dimensions: 170mm (L) x 100mm (W) x 40mm (H) Weight: 0.41 kg Display: Large 4-1/2 digit LCD, 13mm high Max. Time: 199.99 seconds Accuracy: Crystal locked accuracy to better than 0.01%. +/- 1 least significant digit Memory: 20 readings Operating Battery: 3 x AA dry cells