Bone Conduction TechnologyInnovative bone conduction speaker designed for under-pillow use, delivering soothing audio without disturbing others or causing ear discomfort. Versatile Playback OptionsSupports both Bluetooth-compatible and TF card modes, offering flexibility in audio source selection for a personalized sleep experience. Built-in White NoiseComes pre-loaded with white noise sleep-inducing music to help you fall asleep faster and improve sleep quality. Long Battery LifeEnjoy up to 20 hours of playtime at 80% volume, ensuring uninterrupted audio throughout the night. Compact and PortableWith dimensions of 128*54*18mm, this mini wireless speaker is perfect for travel or home use, fitting comfortably under any pillow. User-Friendly DesignFeatures multi-function buttons for easy operation and a Type-C charging port for convenient recharging. Specifications: Bluetooth-compatible Version: 5.2 Transmission Range: 10 meters Speaker Specifications: 8/2W*2 and 4/2W Frequency Response: 20Hz-20KHz Bluetooth-compatible Protocols: A2DP 1.0, AVRCP 1.5, AVDTP 1.0, AVCTP 1.4, HFP 1.5, GAVDP 1.0 Decoding: TF card (MP3, WMA, FLAC, APE, WAV); Bluetooth-compatible (SBC) TF Card Capacity: Up to 32GB Battery Capacity: 900mAh Charging Time: 2 hours Charging Current: DC5V/310mA Material: ABS Dimensions: 128*54*18mm Playback Time: about 20H (at 80% volume) Standby Time: 100 days (when powered off) Charging Interface: Type-C Package included: 1 x Music Speaker 1 x Charging Cable 1 x English Manual