Features: Designed for the ears with three sizes of silicone ear tips, fits the ear concha comfortably and securely, providing a balanced, sealed, and soundproof fit. Ergonomic design effectively reduces noise by up to 24dB, ideal for daily use. Enjoy music quietly without disturbance from touch, helping improve sleep quality. Delivers high-quality o with a stable Bluetooth 5.3 connection, compatible with various devices. Offers 4 to 6 hours of playback on a single charge, with up to 30 hours of total battery life using the charging case. Supports wireless charging, suitable for multiple scenarios. Specifications: Transmission range: 25 meters. Type: In-ear. Bluetooth version: 5.3. Stereo mode: Dual ear (bilateral stereo). Waterproof rating: IPX4. Material: PC+ABS. Battery life: 4 to 8 hours. Package includes: 1 x Bella Sleep Pro earbuds, 1 x USB charging cable, 1 x User manual.