Features:

• Test your Tristar/Hydra Chip or battery
• Diagnose your iDevice's charging issue
• Small & lightweight and easily portable
• Helps to test hardware errors
• Great for smartphone repair professionals and sellers
• Extremely convenient to use
• Able to test the phone Tristar without the need to open up the device all over again

Operation: 

• Step 1: Connect your JC U2 via lighting USB cable to power on (use an apple power plug not pc usb port)
  
  
• Step 2: Click the right function button to select language (language option available only on when you power on JC U2)
  
  
• Step 3: Connect your iPhone/iPad with JC U2 via data connecting cable
  
  
• Step 4:  Optional for you to click the left  function button to switch vertical or horizontal display
  
  
• Step 5: Check the available data of U2 (Tristar) chip and SN,  status  showing as NG or OK for each testing results.
  
  Results:
  
  
  • NG = BAD
    
    
  • OK = Good

Compatibility:

• All iOS Devices with a Lightning Port