1. Dual Connection The WH05 has Bluetooth 5.0 and a 3.5mm cable for flexible use. 2. Clear Audio With advanced drivers, it offers rich sound, deep bass and clear treble. 3. Comfortable Wear Soft ear cups and an adjustable headband ensure comfort all day. 4. Long Battery It provides hours of uninterrupted music or calls on one charge. 5. Stylish & Durable The WH05 is sleek, lightweight, portable and durable. Effective Range:10m Driver Unit:40mm Speaker Sensitivity:105 3dB Speaker Frequency Response: 20-20KHz Microphone Sensitivity:-42÷3dB Microphone Impedance: 2.2KQ Battery Life:Up to 20 hours Charging Time:Approx. 2 hours Weight:214.5g Box size: 19.4*8.5*21.8cm Carton size: 41*33*45cm N.W: 220g N.W: 7kg G.W: 342g G.W: 7.5kg @ty/ctn: 20pcs