Dual Relay Outputs】This digital meter counter has dual relays to control two devices at the same time. It can also independently control alarms, motors, cutters, inverters, solenoid valves, and more to meet your needs. Parameters】The meter counter has an alarm function, two rows of red digital displays, the upper row displays the measured value, and the lower row displays the preset value, which can be measured to 999999. It is equipped with a encoder and a bracket, which can fix the wheels on the machine. Alarm&Automatic Reset】 The alarm can be connected and a preset value can be set in advance. After reaching this value, the alarm will sound, and according to the command, the machine will automatically reset. U-shaped Rubber Design】The U-shaped rubber wheel with larger wide slot, anti-skid and wear-resistant. It is mainly used to measure very thin lines such as fish lines and silk lines. It can completely clip lines into slot with accurate measurement. Service ：We value your shopping experience! If you have any questions, please contact us, and we will respond within 24 hours.