High Speed Charging Cube for iPhoneWith dual USB-C and double USB-A ports. USB C charger block charge four devices simultaneously at high speedno more waiting! The total Max power of 60 watt. (The max power of each USB C port is 30W, and the max power of each USB A port is 18W, while charging multiple devices at once, the output power of each port maybe can't reach their max power) Safety Certification & GaN TechnologyThe charging plug has passed UL/FCC/CE/RoHS certification. Type C Charger built in overvoltage, overcurrent, short circuit, and overheating protection. Protect your device safety and fast charging. USB C wall charger block adopt Advanced GaN chip reduces overheating, improves efficiency, and is 45% smaller than traditional chargers.