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 darkness. 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 TRANSMITTER: Tone Frequency: 200kHz Max. Length Distance: 800m / 2400ft Max. Depth Distance: 60cm / 24in Max. Working Current: Less than 70mA Max. Signal Voltage: 15Vp-p Signal Display: Tone Power Supply: 1 * 3.7V 1100mAh lithium battery RECEIVER: Frequency: 200kHz Max. Working Current: Less than 70mA Earphone Jack: 1 Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.