Features: 1)Complete wireless HIFI high quality: The wireless headset does not worry about the cable immediately entangled in the neck, immediately fall off, and can eliminate all interference when moving. High impact, clear sound and unprecedented fun, light and comfortable. Elsewhere, a unique design is used to ensure a stable strip for a better experience, and a large/medium/small, 3 size ear cap is available, allowing earbuds to be selected according to personal preference. 2)Stable Bluetooth connection: We use Bluetooth 5.0 version, powerful signal, can connect with iOS and Android over a distance of more than 10-15 meters. Unlike the 4.2 version, the transfer speed and stability of the data becomes higher, the sound is clear regardless of the volume, the single digital signal processing and volume equaliser are the best, and the treble and bass are balance. You can put it in different scene every day, enjoy the music you like, and don't worry about disconnecting. 3)Battery extra large capacity: Large capacity charging capacity: The headset can be charged more than 20 times, the capacity is 3000 mAh, and the standby mode can last for more than 30 days. In addition to charging the headset with a portable charging case, the smartphone can also be charged. After charging, you can enjoy 4-5 hours of music. The charging box is included and can be fully charged in 1-1.5 hours. Devices using IOS and some Android systems can display the remaining battery power. 4) IPX5 waterproof and sweat-proof: Waterproof and durable design, using wireless earphone waterproof material to prevent damage caused by sweat and moisture. IPX5 prevents flooding and sweat, water splashing, waterproof protection and waterproof design to cope with sudden rain. It is a great choice for running, training, jogging and cycling. Note: The charging box is not waterproof. 5) Extremely light mini type: The earphones are only 3.9g, clever, unobtrusive, real invisible headphones. It has an excellent design that matches the contours of the ears, tightly meshes with the ears, and uses other noise reduction techniques to prevent leakage. By suppressing noise during and outside the call, you can hear the other party's voice more clearly. It can be used in a variety of usage scenarios such as training, driving, jogging, driving, working, ice skating and conference calls. TWS BT5.0 Headphone: Wireless dual ear design, left and right ear channel separation. You can use the headset solely, or used them in pairs. BT 5.0 brings high data transfer speed, stable connection and low power consumption. Fast & Easy Paring: Auto power on and fast pairing between left and right earbuds. Easy and quick to pair with BT-enabled audio devices. Effective distance is about 10-15 meters in open space. Long Battery Life: 50mAh battery in each earphone ensures about 3-4 hours of working time. Charged automatically in the 3000mAh charging box . Born for Sports: 3.9g lightweight and mini size fit well to your ear canal and provide you long time wearing comfort. It guarantees stability when doing sports. With charging box, easy to store and carry anywhere. 7.2mm Drive Unit & DSP Noise Reduction: 7.2mm dynamic drive unit provides powerful low frequency, delicate, soft medium and high frequency. With DSP intelligent noise reduction technology, it can remove the ambient noise, no need to worry about call quality. Specifications: Model Number: F9-5 BT Version: BT5.0 Transmitting Distance: 10m/33ft BT Protocol: HFP, A2DP, HSP, AVCRP Frequency Range: 20-20000Hz Sensitivity: 98dB Impedance: 16O Charging Box Capacity: 3.7V 3000mAh Earphone Battery Capacity: 2 * 3.7V 50mAh Music Play Time: about 4 hours (depends on music volume) Charging Time: about 1.5 hours for earphones, 2 hours for charging box Color: Black Earphone Item Size: 26.6*21.6*16.4mm/1.04*0.8*0.64in Earphone Weight: 3.9g (Each Earbuds) Charging Box Size: 87*55*32mm Package include: 2x Mini Earphones (Left and Right Ear-buds) 1x Charging box 1x Micro USB cable 1x User Manual