MP3 and Bluetooth Mode: Conduction pillow speaker supports MP3 mode and Bluetooth mode to play music. MP3 mode can use memory card to play music (up to 32GB, not included). Bluetooth mode can be connected to mobile phone Bluetooth to play music.Conduction Technology: Mini bluetooth conduction pillow speaker uses the latest conduction technology to vibrate the sound through the pillow to the ear. You can avoid disturbing the family next to you while listening to music.Timer Function: Bluetooth pillow speaker with timer function, can be set to 30 minutes, 60 minutes, 90 minutes after automatic shutdown, to give you a peaceful night's sleep and save power.Long Battery Life, Bluetooth 5.3: Mini conduction speaker can work continuously for about 20 hours and is fully charged in about 2 hours, giving you a more continuous and comfortable music experience. Pillow speaker with Bluetooth 5.3 version, with a premium chip to ensure stable and clear sound.Improve Sleep: Soft music from under the pillow speaker helps relieve stress and helps you fall asleep faster. Ability to listen to music privately without disturbing others. Tailored to relieve stress and help with deep sleep. It provides great help for adults and babies to fall asleep and get rid of insomnia.