Comfortable to wear Lightweight headphones with a streamlined design that allows for comfortable wearing. The flexible ear cups can be rotated up to 360 degrees. Fits perfectly in your left or right ear without worrying about it falling out easily. Excellent stereo sound quality Adopting advanced CSR chips and A2DP technology, our headphones offer stereo sound quality and more stable signal transmission. Smooth entertainment The flexible microphone double guarantees perfect noise cancellation. The mute function helps with calls. The clarity of the sound is promoted by improved echo cancellation and noise reduction. You can easily make calls with the multi-function buttons on the Bluetooth headset. Intelligent voice control Press and hold the mute button for 2 seconds to activate the phone's voice assistant. Supports Google Voice, Siri, S Voice, Bixby, Skype... and many more voice assistants. Use them to complete the instructions you want. Product Details. Model: YYK-520 Material: PC Color: Black Bluetooth: 5.1 + EDR Charging port: Type-c Built-in microphone Multi-point pairing (connecting 2 Bluetooth devices) Frequency: 2.4GHz Transmission distance: 10m Talk time: 10-12 hours Standby time: 180 hours Wearing style: over-ear Battery: Rechargeable 60mAh lithium battery Product Weight: Approx. 12g/0.42oz The package contains. 1*Bluetooth Headphone 1 * Type-c charging cable 3 * Ear Tips (S/M/L) 1 * User Manual