Fineblue F-V3 Bluetooth 4.1 Wireless Stereo Bluetooth In-Ear Earphone Mini Headset BlackFeatures: 1. V4.1 CSR Master 2. Support Bluetooth stereo music playback function (A2DP) 3. Can connect two mobile phones at the same time (one to two) 4. Display the battery on your iPhone 5. With noise reduction and echo suppression technology, the sound quality in any noisy environment is still excellent. 6. Long standby (about 7 days standby), up to 5 hours talking time 7. One-button power-on pairing, can remember to automatically connect 8. Voice switching between English and Chinese Parameter: 1. Bluetooth version: V4.1 2. Wireless frequency: 2.4GHz 3. Transmission power: Class2 4. Transmission range: 10 meters 5. Charger power supply: 110-240V Packing list: 1 x Headphone with clip 1 x USB cableXDKJ team is your forever loyal partnerAbout Shipping: All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances.Any questions, please feel free to contact usDuring the shopping process, if you have any questions, please feel free to consult us, we will reply you within 24 hours, wish you a happy shoppingThanks for your cooperation and we'll make you feel satisfied.