AC and DC to USB Travel Charger Bundle. Charge your cellphone or PDA wherever you go! AC to USB adapter: Output: 5 Volt DC, 1 Amp, 5 Watts (maximum). Input: 100 - 240 Volts AC, 0.15 Amps, 50-60 Hz. Certifications: FCC, CE. DC to USB adapter: Output: 5 Volt DC, 850 mA. Input: 12 - 24 Volts DC. Certification: CE