ltem description from the seller
Name: K9-1 Earphone Charging
Material: ABS
Input: 5V/2A
Output: 5V/1A
Charging power: 3W
Charging distance: 2-6MM
Conversion efficiency: greater than 70%
Executive standard: QI wireless charging standard
Product color: black, white
Product size: 70 * 7.6MM
Bare metal weight: 26.2g