Feature:1. BONE CONVECTION TECHNOLOGY: Advanced bone conduction technology is used to protect your ears by transmitting music through the pillow without the need to wear earplugs.2. ENJOY MUSIC ALONE: Allows you to adjust the volume of your phone according to your own habits and listen to the music in private without disturbing others.3. TWO CONNECTION MODES: You can choose BT connection to play your favorite music according to your needs, or use the white noise function to provide ambient sound that helps to relax.4. TIMER FUNCTION: There is also a timer function that allows you to set the time you want your music to play before you go to bed, so that you can fall asleep in a comfortable environment.5. COMFORTABLE SLEEP: Place it in the center of the pillow base, it works best when you sleep on your side with your ear near the speaker in the middle of the pillow base, providing the best sleep experience.Specification:Item Type: Pillow SpeakerMaterial: ABSWeight: Approx. 153g / 5.4ozInput Voltage: 5VBT Name: For Z SleepBT Distance: 5-10m / 16.4-32.8ftPlaying Time: -20HCharging Time: -3HProduct Battery: Polymer Lithium Battery 800mah (Built In)Product Size: Approx. 15.5x3.7x1.3cm / 6.1x1.5x0.5in.Package List:1 xPillow Speaker1 x Instruction Manual1 x USB Cable