The CHOE Qi Wireless Charger Kit for Galaxy S4 / S IV/ I9500 comes with a LED indicator (as you can see in the below pictures) that will emit a blue light when the Qi pad is plugged in. It includes a wireless charging pad and receiver.
QI Wireless Charger Kit for Galaxy S4
Specification:(S4 /S IV /I9500 receiver)
8. QI Standard
Specifications: (Transmitter pad)
Input: DC 5V/1000mAh to 2000mAh
Output: 5V 1000mAh
Frequency: 100 to 200 KHz
Wireless distance < 5 mm
Micro USB cable included
Supported devices: LG Google Nexus 4, Nokia Lumia 920, Nokia Lumia 820 , Samsung Galaxy S8/S8 Plus, S4 I9500/S3, note 2, and any Qi Standard smartphones.
Works with any Qi-enabled device through an adapter or an embedded chip
Power Source: AC Adaptor plugs into charging pad
Freedom of Placement: No annoying magnets to align or secret spots to find in order to charge your device. The wireless charging pad is Qi standard, you can charge any Qi-enabled device today, tomorrow and beyond. Light indicator to show charging status.
Wireless charging pad X 1
Cable X 1
S4 wireless receiver X 1
Note: AC adapter not included