Product Details ① Lightweight & Adjustable Frame: Lightweight build with adjustable frame ensures a comfortable fit for extended use during outdoor activities like driving, fishing, or skiing. ② Built-in Hi-Fi Speakers: Integrated into the temples, these speakers deliver clear audio with enhanced bass, providing immersive sound for music or calls without external devices. ③ 270-Degree Temple Adjustment: Flexible temple adjustment allows a customized fit, adapting to different head sizes and shapes for maximum comfort. ④ Bluetooth 5.0 Connectivity: Fast and stable wireless connection enables seamless pairing with smartphones or other Bluetooth devices, reducing signal loss during movement. ⑤ Advanced Noise Isolation: Engineered to block background noise, ensuring crisp audio quality for calls and music playback in noisy environments. ⑥ Polarized Lenses: Reduce glare from sunlight, water, or road surfaces, blocking harmful UV rays to protect eyes during outdoor activities. ⑦ Music & Call Control: Supports music playback (next/previous track) and hands-free calling, offering convenient operation without taking out your phone. ⑧ Compatible with Bluetooth Profiles: Works with headset and hands-free Bluetooth profiles, ensuring broad compatibility with various devices. ⑨ Compact Carrying Case: Includes a portable carrying case for easy storage and transportation, keeping sunglasses safe and scratch-free. Specifications ① Bluetooth Version: Bluetooth 5.0 ② Lens Type: Polarized, blocks harmful UV rays ③ Temple Adjustment: 270-degree adjustable for customized fit ④ Frame Feature: Adjustable, lightweight design Packing List ① 1 x Compact Carrying Case Warm Tips ① Before use, ensure the Bluetooth device is turned on and in pairing mode to connect successfully. ② Store the sunglasses in the carrying case when not in use to prevent scratches and damage. ③ Avoid exposing the sunglasses to extreme temperatures or direct sunlight for prolonged periods to maintain lens performance. ④ To ensure clear audio, keep the speakers clean and free from debris.