Features:
- Compact design, easy to take and test the USB port's output voltage and working current
- Plug and play, the voltage and current will be shown on the display
- Adopted the new generation integrated circuit, high accuracy, stable operation, best anti-interference 
- Suitable for mobile charger, USB disk in factory, lab and personal use

Specifications:
- Working voltage: 3 - 8V
- Working current: 0 - 3A
- Voltage error: less than 1 percent
- Current error: less than 2 percents
- Working temperature: 0 - 60 Deg.C 0.018 Package weight: 0.04108 kg
Product Size(L x W x H): 6.50 x 2.10 x 1.40 cm / 2.56 x 0.83 x 0.55 inches
Package Size(L x W x H): 7.50 x 3.00 x 2.50 cm / 2.95 x 1.18 x 0.98 inches Package Contents: 1 x USB Detector