Features: Made of high- materials, durable, wear-resistant, corrosion-resistant. Insulation probe and built-in loudspeaker can effectively avoid short circuit of conductor and to use. Measurement areas include tracking, short circuit testing, clearance//ringing recognition. For non-terminal cables, clamp mode can be used for direct measurement, as as for telephone and measurement. With optional continuous or adjustable generator, the is simple and the test results are . It is widely used in the maintenance of cables and wires. Specification: Condition: Material: Plastic Color: black+gray Gain: Nominal 30dB Input Impedance: Nominal 100M Ohm Probe Tip Resistance(Min): Metal Tip: 0 Ohm Plastic Tip: 300 Ohm Battery: 1 X 9V Battery DC (NEDA 1604, 006P, Or IEC 6LR61) (Battery Not Included) Battery Life(Nominal): 50 Hours Temperature: Celsius: 0 - 50 Fahrenheit: 32- 122 Size: . 231x55x28mm / 9.1x2.2x1.1in Package Contents: 1 x Cable Tester (Battery Not Included) 1 x Replacement Head 1 x Storage Bag Only the above package content, other are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.