Features 5-digit large-screen LCD display with low power consumption and long battery life. The input adopts the common contact signal, the selection of the sensor is simple and convenient, and the counting is accurate and reliable. Maximum counting speed reaches 20 times / sec. Both the panel and the outside can be 0 cleared. Anti-shock design to prevent data loss,no mechanical wear, reliable operation and long service life. Specification:Item Type:Counter Brand:BERM Product Model: BEM-5C Power Supply Type: Built-In Battery Battery Model: AA R6P Voltage: 1.5V Capacity: 1500mA Counting Range: 0-99999 (5 Digits) Counting The Highest Frequency: 50Hz Count The Minimum Pulse Width: 1mS Contact Maximum Resistance: ≤1KΩ Contact Disconnection Minimum Resistance: ≥500KΩ Clear Mode: Panel / External Operating Ambient Temperature: -5℃ ~ 40℃ Size:64 x 38 x 38mm / 2.52 x 1.5 x 1.5in Opening Hole Size:63 x 36mm / 2.48 x 1.42in   Package List:1 x Counter Package List 1 x Counter