Note: it is suitable for compatible headphones. If you are a perfectionist, please don't buy it. Thank you for your understanding : Product Type: Headset Product Weight: 4-5g (single Headset) Working Time: 3-5 Hours Standby Time: More Than 120 Hours Charging Time: 1-1.5 Hours Wireless Distance: 8-12m Tws Pairing: Open The Charging Box Cover, And The Left And Right Ears Will Reconnect Automatically. When You Approach Your Apple Phone, A Login Screen Appears. Click Connect And Wait A Moment To Successfully Connect. Select Airport As The Pairing Link, Then Place It In The Charging Box To Close Automatically, Open The Charging Cover And Open It Compatibility: Relaxtoo Is Compatible With Android, Ios, Microsoft And Other Bluetooth Phones List Of Packing: 2x Tws Earphones 1x Charging Case 1x Usb Charging Cable 1x User Manual Note: Bright Shooting And Different Displays May Cause The Color Of The Item In The Picture To Look Slightly Different From The Real Thing. The Allowable Measurement Error Is +\/- 1-3cm.