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: Basic Functions: tracking buried irrigation or garden lighting cables, detecting cable break, locating alarm, sound & computer wires, measuring wire depth, and pinpointing drill sites. External Earphones: equipped a pair of 3.5mm earphones that can be connected to the the receiver earphone jack to improve efficiency in a noisy environment. White LED Flashlight: designed with white LED flashlight for auxiliary lighting in the darkne. Power Supply: the transmitter and receiver are both powered by the 3.7V rechargeable lithium battery, both with low battery indicator. Trace and locate underground wires or in-wall wires, the detection depth range is 60cm and the max. cable length is 800m. Specifications: Material: ABS Earphone: 3.5mm earphones Package Weight: 435g / 15.34oz Package Size: 28.3 * 15 * 4.8cm / 11.14 * 5.91 * 1.89in TRANSMITTER: Tone Frequency: 200kHz Max. Length Distance: 800m / 2400ft Max. Depth Distance: 60cm / 24in Max. Working Current: Le than 70mA Max. Signal Voltage: 15Vp-p Signal Display: Tone Power Supply: 1 * 3.7V 1100mAh lithium battery Transmitter Size: 134 * 49 * 33mm / 5.28 * 1.93 * 1.30in Transmitter Weight: 93g / 3.28oz RECEIVER: Frequency: 200kHz Max. Working Current: Le than 70mA Earphone Jack: 1 Power Supply: 1 * 3.7V 1100mAh lithium battery Receiver Size: 163 * 40 * 27mm / 6.42 * 1.57 * 1.06in Receiver Weight: 119g / 4.20oz Packing List: 1 * Transmitter 1 * Receiver 1 * Earphones 1 * Pouch 1 * Manual (English)