AboveTEK USB Power Meter Voltage Tester Current Monitor- USB 2.0 3.0 Volt Amp Reader Multimeter LED screen - Portable Durable mV mA Data Measurement - Check Charging Status and Performance for Solar Panel Charger External Battery Power Bank Best Tools to Check Solar Panel Charger USB Wall Charger Power Bank Performance and Lightning Cable Micro USB Cable Quality Improve Charging Efficiency for iPhone iPad Galaxy Smartphone and Tablet Kindle Nexus - Must Have DIY Gadget Gift for Kid or Teenager - Premium Quality USB Detector Dual Color Current and Voltage Meter for USB interface Simultaneously displaying of Amp and Volt in real-time Measuring Range: Voltage 3.0 ~ 10V Current 0 ~ 3A Accuracy: +/- 1% USB Output Port 1 is dedicated for both Data Sync and Battery Charging. USB Output Port 2 has built-in circuit for Accelerated Large Current Fast Charging