Features 1.[Earphone Upgrade] Earphone Bluetooth cable can upgrade your wired earphones to wireless earphones, easy to connect Bluetooth to enjoy music. 2.[Application Models] Earphone Bluetooth adapter cable for Sennheiser IE80 IE80S IE 8 IE 8i IE80i, etc, as well as other interface compliant earphones. 3.[Long Battery Life] The earbuds Bluetooth adapter cable has built in rechargeable lithium battery that provides up to 20 hours of playback time. 4.[Lossless] Earbuds wireless cable uses Bluetooth 5. 0 technology with a low latency codec to achieve the highest wireless sound quality for lossless sound. 5.[Wire Control Design] This earphone upgrade cord is ergonomically designed with soft ear hooks, controller and integrated mic for calls, volume and music playback. 6.[Wide Compatibility] Earbuds headset Bluetooth adapter cord is compatible with cell phones, tablets, computers and other Bluetooth devices. specificationItem Type: Earphone BT Cable Material: TPE, Oxygen Free Copper Compatible: For Sennheiser IE80 IE80S IE 8 IE 8i IE80i and Other Earphones, As Well As Earphones With Interfaces That Match BT: BT 5.0 Transmission Distance: Approx. 10m/32.8ft Built in Battery: 220mAh Lithium Battery (Shipped With Battery) Play Time: About 20 Hours Charging Time: About 2 to 3 Hours Color: Black PackageList1 x EarphoneBT Cable 1 x Charging Cable 1 x Storage Bag