Feature 1 BONE CONDUCTION: Bluetooth pillow speaker uses bone conduction technology for better sleep quality and is suitable for side sleepers. It will not kink, twist or break under normal use. Supports adjustable volume. 2 SET THE TIMER: Pillow speaker can be set on a timer. Press the power button three times for a beep, then press the volume button to set the timer for 1 or 2 hours. Mini size, easy to carry to travel or for outdoor activities. 3 BUILT IN 400MAH BATTERY: Under pillow speaker with built in 400mAh battery can be fully charged in 1 hour and last for 10 hours of operation. After 10 minutes of charging, you can use it at 70% music volume for about 1 hour. 4 BLUETOOTH 5.0: Bone conduction pillow speaker supports bluetooth 5.0 with faster pairing, wider transmission range and wider data transfer. Even under the pillow, you don't have to worry about losing your music. 5 SMALL MEMORY CARD: Mini pillow speaker can play music on a small memory card (up to 8GB, not included). Download your favorite song or white noise, then plug it into the speaker and you can enjoy your music instantly. 6 EXCELLENT GIFT: Wireless pillow speaker is the perfect gift for Back to School Day, Christmas, New Year, Valentine's Day, Mother's Day, Father's Day. Give it to your loved ones who want a better night's sleep.Item Type: Under Pillow SpeakerMaterial: ABSBattery: Polymer Lithium Ion Battery (Built In) Capacity: 400mAhBluetooth: V5.0Endurance: 10 HoursSound Channel: StereoSleep Mode Setting:Three Clicks Of The M Key Under The Power On State, Enter The Sleep Adjustment Time Block (1 Hour, 2 Hours, Two Gears,) Each Click Volume Plus Once To Add 1 Hour, Each Click Volume Decrease 1 Hour, 2 Hours Capped, Sleep Time To Get to The Device Automatically Shut DownLocal Playback Mode SettingsInsert The Memory Card, Double Click The M Button To Enter The Local Playback, Bluetooth Mode, The Maximum Support Capacity Of 8GBVolume Up: Click Volume +, Long Press The Next SongVolume Down: Click Volume -, Long Press The Previous Song Package List1 x Under Pillow Speaker1 x USB Cable