Usage Tips:The underground wire locator is designed to allow the user to track low voltage cables used for garden and landscape automatic watering systems, and low voltage garden lighting systems. It can also be used to trace other metal cables. Features: Trace and locate underground wires or in-wall wires. Enable cables to be located before drilling. The detection range is 3-feet and cable length 3000-feet. Equipped a pair of 3.5mm earphones that can be connected the the receiver earphone jack to improve efficiency in a noisy environment. Designed with white LED flashlight for auxiliary lighting in the darkness. Can adjust the transmitter and receiver controls to move further distances according to the wire depth. Specifications: Material: ABS Earphone: 3.5mm earphones Net Weight: 273g / 9.64oz Package Weight: 370g / 13.07oz Package Size: 28.3 * 15 * 4.8cm / 11.14 * 5.91 * 1.89in TRANSMITTER: Tone Frequency: 200kHz Max. Length Distance: 500m / 1640.42ft Max. Depth Distance: 50cm / 1.64ft Max. Working Current: Less than 70mA Max. Signal Voltage: 15VP-P Signal Display: Tone Power Supply: 1 * DC 9V NEDA 1604/6F22 battery (NOT included) Transmitter Size: 134 * 49 * 33mm / 5.28 * 1.93 * 1.30in Transmitter Weight: 75g / 2.64oz RECEIVER: Frequency: 200kHz Max. Working Current: Less than 70mA Earphone Jack: 1 Power Supply: 1 * DC 9V NEDA 1604/6F22 battery (NOT included) Receiver Size: 163 * 40 * 27mm / 6.42 * 1.57 * 1.06in Receiver Weight: 101g / 3.56oz Packing List: 1 * Transmitter 1 * Receiver 1 * Earphones 1 * Pouch 1 * Manual (English)