Features:1. 8D surround sound, 5.0 dual-ear chip, large capacity, true wireless Bluetooth headset.2. Graphene bass diaphragm, HIFI high-frequency technology, 10MM dynamic speaker unit.3. HD call, 5.0 automatic boot pairing, CVC8.0 built-in active noise reduction IC.4. Functions: one-button operation, high-definition call, play pause, answer hang up, summon Siri, volume adjustment, switch songs, power on, power on, automatic pairing, intelligent noise reduction, no delay in the game.5. Light and painless wear: the use of high-polymer composite headphone head, both metal-like dazzling light, but also can achieve non-inductive wear Hot point :1. Noise Canceling,9D Stereo surround Sound2. Bluetooth version: 5.03. Connection distance: 10 meters4. LED display function, you can directly understand the power and charging situation5. Bluetooth V5.0, support automatic pairing and most Bluetooth devices6.2000mAh charging box, can also charge headphones and mobile phone7.IPX7 waterproof, no need to worry about water and sweat8. Ultra-mini body for a comfortable wearing experience9. Function: HIFI sound quality. Volume adjustment, emergency mobile power, binaural calls,Automatic interconnection, memory matching, intelligent noise reductionSpecification :Model: F9-5 Bluetooth headsetBluetooth version: 5.0Support Agreement: Support HFP 1.7, HSP 1.2, A2DP 1, AVRCP1.6, SPP 1.2 and PBAP 1.0Bluetooth distance: about 10m/32.81ft.Waterproof: IPX7 waterproofTalk time: about 3-4H (full power single use)Listening to the song time: about 3-H (full power single use)Battery type: 3.7V, 50mAH lithium ion polymer batteryCharging time: about 1HCharging battery capacity: 2000mAhWeight: 150 g headphones 4 gSupport smart phone: Bluetooth 4.0 above smart phone