Features: Cutting-Edge Bluetooth 5.4 Technology: The Lenovo LP51 TWS Earphones feature the latest Bluetooth 5.4 for a stable and low-latency connection to your devices. Dynamic Surround Sound: Experience 3D surround sound that follows your head movement, providing an immersive audio experience. Carbon Fiber Speakers: 13mm drivers deliver balanced sound reproduction with brighter treble and deeper bass for a richer auditory scene. HIFI Stereo Sound: Enjoy a celestial music experience with advanced capacitor crossover for refined high, mid, and bass tones. HD Microphone: DSP technology enhances binaural HD calling for clear communication, suitable for single or dual ear use. Long Battery Life: Efficient power use and a 400mAh battery ensure all-day listening and gaming without worry, with up to 5 hours of music time. Ergonomic Comfort: The lightweight, half-in-ear design with a 45° angle fit offers comfortable extended wear. Instant Game Mode Switch: The music chip upgrade provides enhanced audio and surround sound quality, perfect for gaming. Smart Touch Control: Effortless interaction with touch-sensitive controls for seamless single or dual ear use. Universal Compatibility: Quickly connect with iOS or Android devices, including phones, tablets, and laptops.  Parameters: Brand Name: Lenovo Model Name: LP51 Product Name: Lenovo LP51 TWS Earphones Bluetooth Version: V5.4 Effective Distance: ≥10m Horn Power: 10mW* 2 Speaker Unit: 13 mm Frequency Range: 20-20KHz Impedance: 32Ω±15% Microphone Sensitivity: -38dB±3dB Earphones Usage Time: Approx. 5 hours Earphone Charging Time: Approx. 1.5 hours Earphone Compartment Charging Time: Approx. 1.5 hours Battery Life: 400mAh Available Colors: Multi-color  Lenovo LP51 Packing List: Headphone x2 Headphone compartment x1 Manual & Warranty Card x1 Type-C charging cable x1