Feature: 1. Crcuit detector is a practical auxiliary tool designed for detecting low voltage direct current circuit faultsof transportation machinery. 2. The front of the instrument with LED lighting , more convenient in the light is not good to use. 3. through the internal 9 battery to drive , measure the battery , circuit voltage value ( DCThe display voltage ( DC ) range is wider , and the red light or green light on the side is also lit up , representingthe positive terminal + or negative terminal \" of the detected phase printing The upper lim reaches DC : 0-100V. 4. Display the voltage value of storage battery and circuit by digital tube. 5. Detect the positive terminal \"+\"or the negative temminal \"-\"of the storage battery and circuit That ispositive light green , negative light red. Specification: Features: Crcuit detector is a practical auxiliary tool designed for detecting low voltage direct current circuit faultsof transportation machinery. The front of the instrument with LED lighting , more convenient in the light is not good to use. through the internal 9 battery to drive , measure the battery , circuit voltage value ( DCThe display voltage ( DC ) range is wider , and the red light or green light on the side is also lit up , representingthe positive terminal + or negative terminal " of the detected phase printing The upper lim reaches DC : 0-100V. Display the voltage value of storage battery and circuit by digital tube. Detect the positive terminal "+"or the negative temminal "-"of the storage battery and circuit That ispositive light green , negative light red. Specifications: Battery : 9V : Marker : Red black 1 each ( total length : 110CM ) ; Instruction manual : 1 Connected crocodile clip : red , black 1 each ( total length 62MM ) Package size:15x8x3.5cm Package weight:345g Package List: 1XCircuit Tester 2xTest pen Package List: 1XCircuit Tester 2xTest pen