1. Maintenance of communications-specific power,the power supply is designed Only for mobile phones and other communications equipment. 2. Designed for maintenance,it uses the most advanced short-cuircuit protection resume. 3. The protection of the rapid rate of,And a sound and light alam,after treating the unshorting.To be ruled out after in 1 second automatically resume output. 4. Voltage measurement interface.Can be replaced by precise digital voltmeter measurements voltages DC. 5. Radio-frequency signal detection,Suitable for of communication equipment maintenance.