Special features: XGT 40V USB adapter for charging mobile devices such as smartphones. Equipped with two Type A (DC5 V/2.1 A) USB ports. When the USB adapter is on, the on/off switch lights up green. This allows you to easily see if a (mobile) device is charging. With a full BL4020 battery, you can charge an average phone (3,000 mAh battery capacity) about 2.8 times. With a BL4025, this is 3.5 times, with a BL4040 it is 5.6 times, and with a BL4050F you can fully charge a phone 7 times. USB cables are not included. Technical specifications: Voltage 14.4 - 36 V Model no. ADP001G Weight (EPTA) 0.14 kg Output (current) 2.1 A Dimensions (LxWxH) 96x76x40 mm Suitable for iOS / Android system Battery protection USB port (mobile device charging) 2 Documents User manual