Features: Power requirement: AC 220V for Stronger photoelectric sensor come with reflector, detection distance up to 30cm 6 Digits RED led counter, it is very accurate Data be retained when power failture This kit can detect most of object, for example, metal,plastic,glass,book,clothes,bag,wood,people,etc. Specifications: External Material: Plastic Power Supply: AC 220V Counter Working voltage: AC/DC: 12-24v Display Range: 0-999999 Response Frequency: 10Hz Reset: Manual Counter Operating Temperature: 0-5-45 Product Size: 56x40x85mm/2.2x1.57x3.35" Hole-cutting Size: 50x25mm/1.97x0.98" Quantity: 1 Set Note: Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! No Retail Package Package Contents: 1 x Digital Display Counter 1 x Photoelectric Sensor