i7s tws Headphones Bluetooth 5.0 Earphones Wireless Headsets Stereo Bass Earbuds In-ear Sport Waterproof Headphone free shipping

Details:  Note: This product does not have a retail package box !!!Characteristics:1. hear the song correct; support songs and call; 2. remember phone number; the last call back; all intelligent Chinese and English voice calls; boat; couple; shut down the phone power will be low voice calls;3. Power capacity will show on your Iphone; you can see the power situation at any time; no worry about the electricity; make your life worry free;4. One to two connections; can be connected to two cell phones at the same time5. bluetooth headset connected to the cellphone after shutdown; and then open the bluetooth headset will connect back to the phone automatically; more convenient;6. Smart compatibility: support all bluetooth cellphone; tablet; notebook; sing it; QQ music; movies; etc.; universal all cellphone   Specification:1st driver: 15mm2. impedance: 32 OHM3.Bluetooth version: Bluetooth v5.0 EDR4. Use Bluetooth band: 2.4 GHz5. Power level: CLASS II6. Output power: 30 mW7. Bluetooth distance: 10 meter barrier8. Frequency response: 20-20000Hz9. Operating voltage range: 3.0V-4.2V10. Mic sensitivity: -42dB11. With A2DP / AVRCP high quality stereo audio transmission and remote control protocol12.Powerful noise de-noising circuit (active noise reduction)13. Switch between Chinese and English (boat does not connect Bluetooth state; press the switch 2 times; the sound hear switch successfully)14. Talking time is about 2-3 hours15. Music time over 1.5-2 hours16. Standby time is over 100 hours   Package contains:2 x i7s tws bluetooth headphones (left and right earphones)1 x charging box1 x USB charging cable1 x user manual