Using Bluetooth version 5.1, support 10 meters efficient and stable transmissionFour playback modes, support wireless Bluetooth, AUX, TF card, U diskTwo-timer reasonable sleep, you can set the listening time as you likeLarge capacity battery lasting life can play 12 hoursDual-channel high-fidelity sound quality, restores the real natural environment sound, immersive audio, and visual, slow sleep8 natural sounds, deep sleep guardianGood-looking and practical, versatile minimalist design Specifications: Bluetooth version: V5.1Battery capacity: 1500mAhSpeaker: 45mm 3Ω3WVibration mode: 4070Product power: 3Wx2 Product size: 20 x 5.8 x 6.8cm Product weight: 466g Package included: 1 x Bluetooth Speaker 1 x USB Charging Cable 1 x English and Chinese Manual Other items not included