We recommend that you charge your Beoplay H4 2nd Gen before using them for the first time.
Charging your Beoplay H4 2nd Gen
• Connect the included USB cable to your Beoplay H4 2nd Gen and to a charging adapter, and connect the charging adapter to a power supply.
• After charging your H4 2nd Gen for 20 minutes, they're ready for the first-time setup.
• Total charging time: 2.5 hours using the included USB cable.
Note: A charging adapter of a maximum of 5V / 3A can be used to charge your Beoplay H4 2nd Gen.