Features The product is equipped with LCD display and the reading is clearer. This product count accurately and reliably. This is a digital counter, no mechanical wear, long service life, instead of electromagnetic counter. Lithium batteries are built-in. The theoretical life of the batteries can be as long as three years and the memory time is long. Standard panel installation model, easy to install. Specification: Model: H7EC-NVInput voltage: DC 3-36V Counting format: 0-99999999 LCD display number: 8 digits Display type: LCD - black character External power supply: Do not (built-in 3V 800mA lithium-ion battery) Input: count input / reset input Reset: external reset / manual reset (minimum reset signal time 20ms) Working temperature: -10 - +55°C (no ice or condensation) Storage temperature: -25 - +65°C (no ice, condensation) Working humidity: 25~85% Panel opening size: 44.5MM*22.5MM Installation type: panel mounting Terminal Type: Screw Terminal Intrusion protection: IP66 - dustproof, water resistant Protection: IEC standard IP66, US NEMA standard type 4 (indoor)  Anti-noise: Square wave noise generated by the noise simulator (pulse width 100ns, 1μs rises 1ns) Antistatic force: ±8kV (misoperation) Vibration durability: 10 ~ 55Hz, single amplitude 0.375mm, 3 directions, each 2h Malfunction: 10 ~ 55Hz, single amplitude 0.15mm, 3 directions, each 10min Impact durability: 300m/s2, 6 directions, 3 times eachPackage list: 1 * Counter Note: The actual product color may deviate from the photo due to light. There may be a slight deviation in the measurement of product. Package List