Features: OOTDTY   Battery: use button battery to save electricity. The back of the watch has a round suction cup that can be attached to the glass surface. The dial uses glass liquid crystal display time, the time is clear. An ideal timetable for the home and the car. Low temperature will reduce the suction force of the suction cup, and it will be OK to apply some water on the suction cup. Specifications: Material:ABS Type:Clock,Thermometer Size:Approx.9.5x3cm/3.74x1.18in Net Weight:30g Package Includes: 1x Car Time Clock or 1x Car Thermometer Note: Please allow 1mm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item.