Features: Dual USB output interface can simultaneously charge two phones This product can recharge most mobile phones and tablet PCs. This product provides a charging current of up to 2.1A, and the charging can be adapted to the needs of different devices. Power capacity of up to 5200mAh.This product has a power capacity of up to 5200mAh, it can fully charge the iPhone5s 2.5 times, the iPhone 6 1.5 times, and the Galaxy S5 1.5 times. This product is compact and easy to carry. In today"s era of large-screen mobile phones, every traveller with a mobile phone must also take a portable back-up battery with them so they can charge their phone on the spot when their battery runs out. Small and conveniently sized mobile back-up battery power device has become a necessity for travellers. Employs smart charging management.This product employs smart charging control. Connect the phone to automatically start charging, 10 seconds after the phone has been fully charged, the product will shut down automatically. Four international certifications.This product has been globally certified by four internationally acclaimed and approved certifications: the U.S. FCC, European CE, Apple MFI and environmental RoHS. Multiple safety precautions. Specification: Battery capacity:5200 mAh Power rating: 19.2WH Input voltage/current: 5V/1.5A(max) Output voltage/current: 5V/1.0A; 5V/2.1A(max) Colours: White Item Size: 3.5*1.7*0.8 inches Package Size: 4.1*2.4*1.6 inches Item Net Weight: 4.5ounces Package Weight with item: 6.5ounces Master Carton Size:16.9*7.9*5.1 inches PCS/CTN:30pcs Packaging: 1 x power bank unit ; 1 x power cable; 1 x user manual