Features: Enjoy hands-free communication anytime-anywhere with our bluetooth-compatible glasses earphone set! Made of high-quality ABS material, our earphones operate at a frequency of 2.4GHZ-2.480MHZ and provide crystal-clear stereo sound. Perfect for busy professionals, athlete, driver, and anyone who needs to stay connected on the-go! Ideal-for outdoor activities such as running, cycling, hiking, or driving, our Bluetooth-compatible glasses earphone set allows you to make and receive calls without interrupting your routine. With customizable voice prompts in both English and Chinese, you can easily switch-between languages and enjoy seamless communication with-friends and family around-the world. Specifications: Material:ABS Size:As Picture Shown Color:Black/Yellow/Transparent-Color/Dark Brown Operating frequency: 2.4GHZ-2.480MHZ Call support: call support, with its own microphone, continuous call for 4-6 hours. Note: .Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. .Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understandings. Package includes: 1 Set Bluetooth-compatible Glasses