Specification:1. Material: ABS, aluminum alloy2. Applicable to: Applicable to all models3. Input voltage: 12-24V5. Charging current: PCB1: 5V-3.1A, PCB1: 5V-2.4A5. Charging current: 3100mA6. Interface: dual USB7. Size: 6x3 cm8. Weight: 23 gramsFeatures:1. USB surface with PE protective film2. Indication: LED display, real-time monitoring of battery voltage and charging voltage and current3. Double USB full output, private mold, safety and environmental protection4. Interface: dual USB ports work at the same time, can charge multiple devices at the same time

http://olla.gr/2-pcs-aluminum-ring-display-car-charger-qc3.02.4a-aluminum-alloy-multi-function-halo-digital-display-car-charger-champagne-red/