LLab ETL Certified 34watts 4-port USB Handy Travel Wall Charger Adapter for iPhone iPad Mobile Phone Smartphone Tablet Bluetooth Headphone Speaker Power Bank(White) 34 watts total output on 4 USB ports.(2.4A port*2 for iPad and Tablet, 1A port*2 for iPhone and other mobile phone device.) Smaller but same power. It is 1/3 smaller(2.79*1.89*1.18inch) than other device with same power output. Grab and go, handy on the go. LLab stunning Smart Circuit Solution detect iOS and Android OS device automatically, to ensure fastest single charge for your device. With EU countries AC plug adapter. it supports auto-switching AC100-240V input. Foldable AC plug for convenient storage. ETL certified meets the standard of UL 60950-1 and CSA-C22.2. Compliance to Authorities Having Jurisdiction(AHJs) North American industry safety standards.