Features: 1. V9 Wireless Headphones built-in 140mah large battery to provide you with battery life protection anytime and anywhere.2. Intelligent active noise reduction, reduce the surrounding noise and make the call clearer.3. Each time the Bluetooth-compatible headset is connected to the phone, the Bluetooth-compatible headset will automatically connect back to the phone when it is turned on, which is convenient and faster.4. Intelligent compatibility: support all mobile phones with Bluetooth-compatible function tablet notebook device all mobile phones5. You can connect two Bluetooth-compatible devices at the same time, switch to listen to songs, games, and calls at any time.6. Strictly fitted waterproof, sweat-proof and dust-proof rubber plugs to prevent sweat, water and dust from corroding components7.270 degrees rotating design, suit for left and right ear8. High-quality call listening experience long battery life no fear of running out of power9. V9 Car Hands0 Business Headset With MicrophonePairing method: Pairing for the first time long press the boot key for 6 seconds,activate Bluetooth-compatible matching mode,LED flash A red light/blue light flashing light in dicales amatching state V9 to connect to the phone Bluetooth-compatible. Button function: long press to power on, long press to turn off, click music pause / play / call answer / hang up phone Product parameters: Bluetooth-compatible version: Upgrade the V5.1 Bluetooth-compatible ChipColour: BlackMaterial: ABSBattery Capacity:Polymer Lithium Battery 140 MahTalk/Listening to music time: 6-20 Hours(Answer/Hang Up) (Pause/Play)Talk time: 6-20Hours (Answer/Hang Up)Standby time: about 240 HoursCharging time: 1 hour Package Contents: 1 x V9 Bluetooth Earphone1 x USB Charging Cable1 x Size Ear Cap1 x Chinese And English Manual Very happy to serve you, dear customer 1. Factory direct sale, support wholesale, look forward to working with you for a long time2. we will DO NOT put any invoices, QR codes, promotions in the