Accurately hear music, while supporting both songs and phone calls; 2. Easily recall the last dialed number; voice calls in intelligent Chinese and English; hands-free conversation; and low battery reminder when powering off the phone; 3. Battery capacity displayed on your iPhone; providing real-time power status and eliminating worries about running out of battery; 4. Connect to two devices simultaneously;5. Automatically reconnects to your phone after powering off the bluetooth headset; ensuring convenience;6. Universally compatible with all Bluetooth devices such as cell phones, tablets, laptops, music and movie players, etc.

 Specification:

• impedance: 32 OHM
  
• Bluetooth version: Bluetooth v5.0 EDR
• Use Bluetooth band: 2.4 GHz
• Power level: CLASS II
• 6Output power: 30 mW
• 7Bluetooth distance: 10 meter barrier
• Frequency response: 20-20000Hz
• Operating voltage range: 3.0V-4.2V
• Mic sensitivity: -42dB
• With A2DP / AVRCP high quality stereo audio transmission and remote control protocol
• Powerful noise de-noising circuit (active noise reduction)
• Switch between Chinese and English (boat does not connect Bluetooth state; press the switch 2 times; the sound hear switch successfully)
• Talking time is about 2-3 hours
• Music time over 1.5-2 hours
• Standby time is over 100 hours

  Package contains:

• 2 x i7s tws bluetooth headphones (left and right earphones)
• 1 x charging box
• 1 x USB charging cable
• 1 x user manual