For BOSE QC25 OE2 QC35 AKG Y50 Y40 Headphones Bluetooth Cable 1. Compatible with most 2.5mm interface headphones, including BOSE OE2 AE2 QC25 QC35 and AKG K490 K545 Y40 Y50 Y45 LIVE2 models 2. Smooth and refined design; this cable converts your wired headphones into wireless Bluetooth headphones 3. Equipped with Airoha AB1512 Bluetooth chip 4. Supports high-quality audio transmission with A2DP protocol and a data rate of up to 768kbps 5. Bluetooth version 4.1 for stable wireless connectivity 6. Amplifier output power: 18mW RMS 7. Amplifier signal-to-noise ratio: 95dB 8. Playtime: 6 to 10 hours on a full charge 9. Charging time: 1 to 2 hours 10. Conductor material: bare copper wire 11. Cable material: oxygen-free copper 12. Weight: approximately 30g Bluetooth Pairing Instructions: - Enable Bluetooth on your mobile device and begin searching for available devices - With the headset powered off, press and hold the power button until the red and blue LED lights flash alternately - Search for "BTH Headset" on your phone and select it to connect - Note: The device is only discoverable when the red and blue lights are flashing alternately