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 SongPackage List1 x Under Pillow Speaker1 x USB Cable1BONE 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. 2SET 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. 3BUILT 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. 4BLUETOOTH 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. 5SMALL 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. 6EXCELLENT 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.