Pairing and sound have been confirmed. Thank you. Product Description Specifications: Item Type: YYK-520 Wireless Business Headset Material: ABS Version: Supports Bluetooth V5.0: A2D.AVRCP.HFP..EDR Communication Distance: Approx. 10m/32.8ft Frequency Band: 2.4GHz-2.480GHz Standby Time: 120 hours Talk Time: Approx. 5 hours Music Playback Time: Approx. 5 hours Earphone Battery Capacity: 60mAh battery Charging Compartment Battery Capacity: 500mAh battery Earphone Charging Time: Approx. 1.5 hours Charging Compartment Charging Time: Approx. 1.5 hours Package List: 1 x Earphone 1 x Charging Compartment 2 x Ear Caps 1 x Charging Cable 1 x Instruction Manual About this product Dedicated to Hands-Free Calls, Equipped with a Microphone and Mute Function: The Bluetooth headset is equipped with a single-directional microphone and CVC8.0 noise-canceling function, which accurately picks up your voice and blocks out surrounding noise, enabling clearer calls, delivering clear audio to the other party even in noisy environments. In addition, a mute function is also included to protect personal privacy. During a call, pressing the "MFB key" will prevent your voice from being heard by the other party, which is convenient when handling confidential information, such as during meetings. Furthermore, it can connect to two devices simultaneously, allowing you to separate your personal and work life, making it very convenient to handle calls from either phone. Ergonomic Design, Compatible with Left and Right Ears: The Bluetooth earphones are designed with an ergonomic, ultra-lightweight 12g design, providing a comfortable fit that reduces ear fatigue. The in-ear design, compared to other types, is designed to be less likely to fall out of the ear with a three-point support design that secures it deep within the ear, allowing you to easily make calls even in crowded vehicles. Three sizes of replacement ear tips are included, allowing you to choose according to your ear size (S, M, L). The ear hook is extendable (the extendable part can rotate 270°) and the microphone boom can rotate up and down 180°. This single-ear earphone fits both left and right ears, allowing you to comfortably wear it on either ear and enjoy calls and music playback. Bluetooth 5.3 Connection Stability, Automatic Pairing