ITEM NAME:Fast Charging Wireless 10W Charger PCBA Circuit Board With Dual 2 Coils Gre C2H9 Description&Preview.Charging power: Max 10W. Support 5w, 7.5w, 10w. Charging Efficiency: 75%. You can follow below process to chontact us. Input Power: DC 5V 2A / DC 9V 1.5-2A. Product Certification: CE / FCC / ROSH.