Antenna loop size: 260mm/10.2inch (inner diameter) Working frequency: 10KHz-159MHz Operating temperature: -10 to +60 Operating Voltage: 5V/1A Power supply mode: TYPE-C charging/built-in 18650/2600mAh Impedance: 50Ohm Gain: 20db (Max) Charging circuit: built-in battery protection circuit to protect the battery from over-discharging and over-charging. It will automatically disconnect when the battery voltage is lower than 2.5v Colour:black Material:plastic Package Contents: 1 x Antenna with control box 1 x English manual 1 x BNC cable (5m/16.4ft) 1 x Power cord (Type-c) 2 x Output cables (BNC-3.5 x 1m/3.3ft; BNC-BNC x 1m/3.3ft) 1 x Adapter (BNC-SMA) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.