* Deliver 8D stereo surround sound quality for more immersive music listening and gaming experience.
* Advanced BT 5.1 chip, provides one-step pairing, fast transmission speed, stable connection and low power consumption.
* Large-capacity battery charging case provides long battery life. It can work as a power bank to charge mobile phone for emergency.
* Oblique in-ear ergonomic design, lightweight and no pressure, makes it comfortable to wear for a long time, no damage to hearing.
* Various operations can be done easily via smart touch-control, such as voice assistant wakening, volume and music control, etc.
Features: * Deliver 8D stereo surround sound quality for more immersive music listening and gaming experience.  * Advanced BT 5.1 chip, provides one-step pairing, fast transmission speed, stable connection and low power consumption. * Large-capacity battery charging case provides long battery life. It can work as a power bank to charge mobile phone for emergency. * Oblique in-ear ergonomic design, lightweight and no pressure, makes it comfortable to wear for a long time, no damage to hearing.  * Various operations can be done easily via smart touch-control, such as voice assistant wakening, volume and music control, etc. * LED-digital screen with indicator lights show clearly the battery charging status and remaining level. * Precise structure, life waterproof and sweat proof, allows you to enjoy sports freely. * The left and right earbuds can be used together or independently.  Note: * Please read the user manual carefully before use. * There may be slight errors due to manual measurement. Specifications: Model: F9 Material: ABS Color: Black BT Version: 5.1 Speaking Diameter: 8mm Transmission Distance: 10m-20m Earphone Battery: 50mAh Charging Box Battery: 2500mAh Call Time: 4-5H  Play Time: 4-5H Charging Time: 1H (earphones); 2H (charging case) Frequency: 2402MHz-2480MHz Working Temperature: -10℃~55℃ Item Weight: 81g / 2.86oz (with charging case) Package Size: 11.2 * 8.9 * 4.5cm / 4.41 * 3.5 * 1.77in Package Weight: 111g / 3.92oz Package List: 1 * BT Earphones 1 * Charging Box 1 * Charging Cable 4 * Earplug Silicone Caps 1 * User Manual (English)