Operating voltage: 5V

 Charging current limit: 500mA

 Operating frequency: 24kHz/48kHz

 Operating time (at operating current): Depends on the headphones' battery life

 Standby time: Unlimited (depends on the smartphone)

 Charging time: Charged via USB-C port on a smartphone, PC, or tablet

 Battery charging from 0V (no load): This product does not have a battery