Features PRODUCT PARAMETERS: double row 4 digit count, red digital display, can count 9999, can count positive and negative, double relay control AUTOMATIC ALARM: can be connected to the alarm clock, supports early warning setting. After reaching the preset value, the alarm is automatically activated and automatic reset can be set, convenient work WITH MEMORY FUNCTION: In case of sudden power failure, the machine will maintain the value before power failure after power recovery FULLY AUTOMATIC OPERATION: With two relay inputs, AL1 and AL2, you can connect the entire line to control other equipment for fully automatic operation WIDELY USE: Used to record the length of fabric in fabric factory, textile factory and garment factory, also can be used in printing factory, etc. Specification: Item Type: Digital Length Gauge Model: BEM48 30C4 L CT Product voltage: AC100-240V Counting Range: 1-9999 Input mode: Contact signal or pulse signal Control mode: Relay contact output Preset or not: Yes Package List: 1 x Digital Length Gauge 1 x Bracket 2 x Accessories 1 x User Manual Package List 1 x Digital Length Meter 1 x Support 2 x Accessories 1 x User Manual