YDP-SPORT Mini USB Tester USB Capacity Detector Digital Display 3V-30V Mini QC2.0 QC3.0 Multi Function USB Tester Suit For Current Voltage Capacity Timer etc Monitor Function Security Tester STRICT QUALITY CONTROL: Every product Extensive compatibility with superior materials and strict test monitoring. MULTIFUNCTION: The versatile USB Detector can be used for capacity storage, over voltage and under voltage protection. The multi gauge also support QC 2.0/3.0 fast charging and automatically cut off when the device is full charged, effectively protect your device. HIGH QUALITY LCD PANEL: Our high quality LCD monitor with great advantages of low power consumption, bright and clear provide a soft using enjoyment. EXTENSIVE COMPATIBILITY: It can applicable for powerbank, car charger, laptop ,tablet phone and it will help you judge the current voltage capacity for your device. PORTABLE: This Mini USB tester easy to carry, take it put in your bag or your pocket when you go out or do the business travel.