Parihy Wireless In-Car Bluetooth FM Transmitter Radio Adapter Car Kit with 1.44 Inch Display and USB Car Charger Please Search " Parihy pa01s true wireless earphones" on youtube for product show. [Designed for your active lifestyle] Ergonomic design allows for ultimate comfort match to any active lifestyle, such as running, jogging, hiking, cycling and gym exercise. Anti-drop design makes sure your earbuds stay-in all the time even for intense activity even you shake heads crazy which you can check our youtube video show. [Bluetooth 5.0V & Two Modes &Upgraded Pairing system] The latest Bluetooth 5.0 ensures a more stable signal transfer and connection. Support Stereo and Mono modes allows you not only to enjoy stereo sound music, but available to use L or R earbuds alternately to prolong playing time.( Note: only right earbud works for phone call). and pairing system are automated pairing for both modes while other similar product still requires manually pairing for Mono mode. [Powerful battery backup] Support 2.5hrs continuous music playing time sames as other true wireless earbuds due to its limited size and fully wireless feature. But we upgraded the portable charging case to be 2000mah instead of 450mah. Means it can charge earbuds upto 15rounds to guarantee extra 30hrs playing time providing full battery for outdoor activities or long road trip. The charging case is portable and easy to carry around. [Premium sound quality] We keep challenging extreme limits for better sound quality. It Offers a truly natural and authentic sound performance with focus on getting a clear midrange and a balanced bass and treble performance, ensure that you dont miss any part or component of your music. Aptx,CVC6.0, superbass, A2DP/AVRCP audio processing system and 10mm high quality vibrating diaphragm are adopted to persuit for excellent music performance. [Exclusive Advanced Charging System] Adopts two independent L&R detecting chips to prevent both sides from overcharged or unfully charged. Updated charging system also support fast charge 80% battery capacity in first 30mins,then switch to trickle charging to protect the battery life for both earphones and charging box.