Easy connection: Take both earphones out of the charging case. The headphones are automatically switched on and successfully paired with each other within 5 seconds. Please note: If R & L earphones cannot pair successfully after a while, press the MF button on both headphones for 5s to turn off the headphones. Then turn both headphones on again, they are automatically paired with each other. Easier operation via multifunction button: Power on/off, play/pause, volume up/down, forward/backward, answer/reject incoming call, activate Siri/Google Assistant, for more information, read the user manual (English lnaguage not guaranteed). Sweat and weather resistant material: These headphones are rated IPX4. Powerful bass: The headphones deliver Hi-Fi sound with "Super Bass" and provide excellent sound. Active Noise Cancelling Headphones (Noise Reduction) reduce environmental noise and create optimal conditions for listening to music on the go.