Warm reminder: In order to enjoy a better experience, please charge Browse more products and click "Seller Information" to enter my store to purchase Main focus: The ergonomic custom design gives you a comfortable ear feel when using it. The large-capacity battery has long battery life, so you don';t have to worry about running out of power after charging. Designed for sports and sightseeing, the earbuds won't get in the way of sweating and provide a secure fit. The earphones are made of high-quality materials, durable and long-lasting. Due to long shipping time, the battery of the headset may become exhausted. After receiving, please charge the earphones for 2 hours before use. Connection method: 1. Open the package, tear off the insulation film on the earphones, take out the left and right earphones and put them into the charging compartment. The headphones light up. If it doesn't light up, recharge the battery. 2. Take the headset out of the charging case and it will automatically turn on and pair. Wait about 10-20 seconds and the left and right earbuds will sync automatically. Pairing successful. 3. Turn on Bluetooth on your phone, find the Bluetooth name of the headset, and click Connect. You can set a variety of sound effects in the music APP, including stereo bass. 4. After using the earphones, put them back into the charging compartment, and the earphones will automatically turn off and charge. 5. Use the headset again, take it out of the charging compartment, automatically turn on, and automatically pair and connect with the mobile phone (can be operated with a single headset). For more details and operation methods of additional functions, please read the product user manual Describe: Headphones can reduce noise, extend battery life, wear comfortably, support wireless functions and bring you real sound. Specifications: Color: Black, White (optional) Headphone program: 5.0 + EDR Protocol: A2DP, AVRCP, HSP, HFP Headphone channel: true stereo Control method: touch control Prompt tone: English Wireless use frequency band: 2.4 Ghz Effective distance: 10 m barrier free Microphone: Built-in Pairing: automatic pairing after start-up Horn diameter: 8 mm Impedance: 32Ω Sensitivity: 42db Battery capacity: Headphone 55 mAH Charging bin: 450 mAH Headphone music time: 2-3 hours Headphone talk time: 3-4 hours Waterproof rating: IPX5 perspiration Battery compartment charging interface: micro USB Charging time: 1-1.5 hours Magnetic charging box: for 3-4 times charging Charging box Charging voltage: 5 v