HIGH TEMPERATURE RESISTANCE: High temperature can be used for measuring USB powered or power consumption of the interface , mobile phone charger , U disk and other products. APPLICATION: USB powered devices can be used to measure air , voltage loads , USB terminal equipment working voltage and current . HIGH QUALITY: The tester uses a of power four semi~ double loop integral converter IC , with a precision bandgap reference , range accuracy , high precision , stable and reliable performance , strong anti~interference ability. PLUG AND PLAY: Small size , no power , and other ancillary equipment, plug and play also detect USB charger output voltage and current are standard suitable for factories, Laboratory and users. EASY TO USE: Can measure the operating current of the output voltage of the USB port and equipment. Input / output voltage 3V-9V Voltage resolution: 0.01V Input / output current: 0A-5A (see the range of use 0-3A) Current resolution: 0.01A Accuracy: plus or minus 1% Line loss: about 0.1 ohm Test content: voltage, current color:Black Material:ABS Package Contents: 2 x Multimeter Meter 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.