【Premium Sound Quality】Equipped with a 3W high-fidelity speaker and advanced audio chip, this Bluetooth speaker delivers Hi-Fi sound for an immersive music experience 【Bluetooth 5.0 Connectivity】Featuring Bluetooth 5.0 technology, it ensures faster transmission, lower power consumption, and enhanced anti-interference ability, allowing seamless and stable connections 【Timeless Retro Design】Designed with a classic rotary knob for infinite volume adjustment, it combines vintage aesthetics with modern functionality for a nostalgic yet practical experience 【Portable and Durable】Lightweight and compact, this speaker comes with a sturdy leather handle, making it easy to carry outdoors without compromising durability 【Versatile Playback Options】Supports multiple playback modes, including Bluetooth, memory card, U-disk, and AUX input, providing flexible options for all your audio needs 【Support Hands-Free Calling】Enjoy hands-free calling with a single button when connected to your phone Specifications: Connection method: Bluetooth connection Frequency response range: 40HZ-20KHZ Output power: 3W Wireless distance: 10m Signal-to-noise ratio: ≥75dB Playing time: 6 hours Charging time: 2-3 hours Memory card: up to 32GB Bluetooth protocol: 5.0 Battery capacity: 400mAh Bluetooth connection method: long press the power button in the middle, turn on the audio, then turn on the Bluetooth on the phone to find the Bluetooth "HM11", and just connect it