Name------------------------Lenovo HE05 BT Version------------------5.0 Material---------------------Metal, Silicone, TPE Transmission Distance---10m (no obstacle) Waterproof----------------IPX5 Dustproof------------------IP6X Battery--------------------3.7V / 100mAh Working Time------------ about 8 hours Standby Time-------------about 120 hours Charging Time----------- about 2 hours Color---------------------- Black, Red, White (Optional) Horn Diameter-----------10mm Speaker Sensitivity------98dB Frequency Response Range--- 20-20kHz Package includes: 1*He05 1*Micro usb cable 3*ear hats(S,M,L) 1*Manual Lenovo HE05 Sport Bluetooth Earphones BT 5.0 Wireless | Magnetic Earbud | with MIC| 8Hrs Playtime |