Features: 1. 100% brand new and high quality. 2. You can use it in the dark light with flashlight. 3. With an earphone support to enable service technician to work conveniently and comfortably in noisy environment. 4. Sensitive sensor, stable and reliable. 5. High quality protective case provides more secure protection. 6. Used in telecommunication network line engineering and daily maintenance, computer network line engineering, other metal wire line engineering and maintenance work Specification Model: GM60 Transmitter Receiver Dimension 64*31*119mm/2.5*1.2*4.7in 48.6*26*177mm/1.9*1.0*7.0in Power(not included) 1. 5V AAA*3batteries 6F22 9V battery Signal TracingTransmit DistanceDisplay >1km Display LED Operating Temperature -10-40 (14-104) Operating Humidity 10-95% Storage Temperature -20-60 (-4-140) Weight: Approx. 280g / 9.9ozPackage List:1 * Emitter1 * Receiver1 * Network Cable2 * Cable with Crocodile Clamp Note: 1. To prevent electric shock and personal injuries,please do not: .2. Trace the cable with strong current lest personal injuries and/or equipment damage occur.3. Use the unit in thunder storm weather lest it results in personal injury and/or equipment damage.4. To avoid the damage of the device and the detected, please pay attention to the following:5. Do not use the cable order verifying function for the cable that has electricity.6. Take out the batteries if the product is expected not for use for long time, to avoid erosion of the battery leakage which may result in poor battery contact.7. Do not dismantle the device. Please contact the local dealer to repair the product by authorized technicians.