Personalize EQ and select various music modes via Edifier Connect APP. 2hrs fully charged for 40hrs music playtime. Fast charging: 6hrs playback in just 10mins. 30mm dynamic driver Double protection for safe hearing: Volume <85dB and a cut-off timer. Foldable and lightweight design Ideal for daily use and travel. Trendy color options for users to match their styleBluetooth V5.2 Bluetooth Protocol A2DP, AVRCP, HFP Effective Distance 10M Playtime (hours) 40hrs Battery Capacity 350mAh Charging Port USB-TypeC Input 5V / 1A Charging Time Approximately 2H (Fast charging supported: 10mins=6hrs) Weight 172g