Features 1.Widely Applicable: Headphones bluetooth cable for ATH CKS1100 E40 E50 E70 LS200 LS300 LS400 CKR90 CKR100 LS50 LS70 and other headphones with A2DC interface. 2.Upgrade Function: Wireless bluetooth cable can upgrade your wired headphones to wireless headphones, making your headphones more convenient, and easily connect to Bluetooth to enjoy music. 3.Long Standby: Headphones wireless upgrade cable has built in rechargeable lithium battery and ultra efficient Bluetooth 5. 0 technology to provide up to 20 hours of playing time. 4.HiFi Lossless Sound: Wireless bluetooth cable with low latency codec, it can ensure the highest wireless sound quality through Bluetooth and provide lossless sound quality. 5.Multiple Function: Headphones wireless upgrade cable is equipped with a cord ear hook, a controller and an integrated microphone for call, volume and music playback. 6.Wide Compatibility: Headphones bluetooth adapter cable is compatible with mobile phones, tablets, computers and other Bluetooth devices. specificationItem Type: Bluetooth Earphone Wireless Upgrade Cable Material: TPE, Oxygen Free Copper Bluetooth: Bluetooth 5.0 Transmission Distance: 10m/32.8ft Built In Battery: 220mAh Lithium Battery (Shipped with Battery) Play Time: About 20 Hours Charging Time: About 2-3 Hours Color: Black Applicable for ATH CKS1100 E40 E50 E70 LS200 LS300 LS400 CKR90 CKR100 LS50 LS70 and other headphones with A2DC interface PackageList 1 xBluetooth Earphone Wireless Upgrade Cable 1 x Charging Cable 1 x Storage Bag