Feature: 1. 6-digit large-screen LCD display with low power consumption and long battery life. 2. The input adopts the common contact signal, the selection of the sensor is simple and convenient, and the counting is accurate and reliable. 3. Maximum counting speed reaches 20 times / sec. 4. Panel and external can be zero-clearing, anti-shock design, effectively prevent data loss. 5. No mechanical wear, reliable working, long service life. Specification: Item Type:Counter Brand:BERM® Product Model: BEM-6C Power Supply Type: Built-In Battery Battery Model: AA R6P Voltage: 1.5V Capacity: 1500mA Counting Range: 0-999999 (6 Digits) Counting The Highest Frequency: 20Hz 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:61 x 36mm / 2.4 x 1.42in . Package List: 1 x Counter