The FUZRR ES1001 Wireless H/L Voltage Clamp Current Tester is a high and low voltage current measuring instrument designed for online electrical current testing and transformer current measurement. It supports both insulated and bare wire testing and includes a 5-section insulated rod with a total length of 5 meters. The device measures current from 0.0mA to 1200A with 0.1mA resolution and supports wireless data transmission up to 30 meters. It also provides storage for up to 200 data groups, making it suitable for high-voltage electrical inspection and maintenance applications.