X9 wireless headset $ 27.61 Headphone material: plastic Channel: 2 Bluetooth version: 5.0 Color classification: X9Plus battery life version [thousand yuan noise reduction + 3500mAh charging bay (rechargeable mobile phone) + Bluetooth 5.0] X9 portable version [thousand yuan noise reduction + 700mAh charging bay + Bluetooth 4.2] Waterproof performance: IPX7 How to use: In-ear Whether single and double ears: bilateral Transmission radius: 10m Connect the headset and playback device connection method: Bluetooth connection
