Edifier WH500 Wireless On-Ear Headphones -Bluetooth V5.2 -Playtime 40 hours -USB-C (Type-C) -BLUE 30mm dynamic driver 2 hours fully charged for 40hours music playtime Fast charging_ 6 hours playback in just 10 minutes Customize EQ and select various music modes via Edifier Connect app 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 style Bluetooth V5.2 Bluetooth Protocol A2DP, AVRCP, HFP Playtime (hours) 40 hours Charging Port USB-C (Type-C) Charging Time (hours) Approximately 2 hours (Fast charging supported_ 10 minutes = 6 hours) Input 5V ⎓ 1A Audio Coding SBC Driver 30mm PEEK＋PU Frequency Response 20Hz - 20kHz Output Sound Pressure Level 91dB ± 3dBSPL(A) Weight 172g Dimension (L x W x H mm) 163.3 x 67.2 x 184mm