Feature: 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: H7ET-NV1 Input voltage: DC 3-36V Working mode: on Time format: 9999 hours 59.9 minutes; 999 hours 59 minutes 59 seconds Number of characters per line: 7 Display type: LCD - black character Display character - Height: 0.338" (8.60mm) Reset: external, front panel Panel opening size: rectangular (45.00mm x 22.20mm) Installation type: panel mounting Terminal Type: Screw Terminal Intrusion protection: IP66 (dustproof, water resistant) Built-in battery type: CR2 lithium-ion battery 3V/800mA (lifetime over 3 years) Package 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. 1、The product is equipped with LCD display and the reading is clearer. 2、This product count accurately and reliably. 3、This is a digital counter, no mechanical wear, long service life, instead of electromagnetic counter. 4、Lithium batteries are built-in. The theoretical life of the batteries can be as long as three years and the memory time is long. 5、 Standard panel installation model, easy to install.