Air f9 pro true wireless bluetooth headset binaural sports invisible single ear in-ear hanging ear ultra-long standby endurance universal

Model: F9 pro Function: NFC function, call function, music support, voice control, power display, multi-point connection Bluetooth version: 5.0 Color classification: black, white Headphone category: active noise reduction headphones How to use: In-ear Transmission radius: 10m Whether single or double ears: unilateral hands-free Standby time: 6 days Connection between the left and right cavities of the earphone: wireless connection Dustproof performance: IP5X Headphone and playback device connection method: Bluetooth connection