Features: 
- High quality, small sized, easy and convenient to carry 
- It can measure current and voltage of the power supply equipment with USB port 
- The voltage and current will be displayed circularly 
- Plug and play, no extra power supply needed.

Specifications:

• Features:
  - High quality, small sized, easy and convenient to carry
  - It can measure current and voltage of the power supply equipment with USB port
  - The voltage and current will be displayed circularly
  - Plug and play, no extra power supply needed.
• Workable range: U= 3.5 - 7.0V, A= 0 - 3A
• Resolution: Voltage 10mV, current 1mA
• Error Range: Voltage
• Full-scale Voltage Drop: 200mV
• Workable Temperature: 0 - 60C
• Color: Blue
• Product Dimension(L x W x H): 52 x 34 x 15mm
• Product Weight: 17g