Features: Time, minute, second independent-key operation, press once to enter directly, easy operation. Four channels sound different, easy to distinguish. Resettable, one-key to clear 0, big button, easy to operate. CLOCK function (press Clock to enter the clock states, press any keys T1-T4 to enter the countdown or positive timing states). The back attached with magnets, bracket, hanging-hole, can be pasted on the metal surfaces, can be placed on the desktop, can also be suspended. Four groups of channels can be timed simultaneously or separately, with a-maximum countdown of 99 hours, 59 minutes and 59 seconds and a-minimum of 1second. Specifications: Material: LCD-, Plastic Size: Approx. 70x24.5x91mm/2.76x0.96x3.66in LCD-Size: Approx. 54.5x24.5mm/2.15x0.96in Battery: 2x1.5V LR44 Batteries(Included) Package Includes: 1x Timer note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.