Features 1.Advanced Technology: The pillow speaker uses the latest conduction technology to deliver sound to your ears in a vibrating, compact and portable way through your pillow. 2.Soft Whisper: The bluetooth pillow speaker produces a soft whisper that helps relieve stress and helps you fall asleep faster. 3.Improve Insomnia: Mini portable under pillow speakers provide great help for adults and babies to fall asleep and get rid of insomnia. 4.Supports Memory Card: The pillow speaker can be inserted into a maximum of 128GB Memory Card to use to store songs. (Note: Memory Card is not included in this product) 5.Compact and Mini: Portable under pillow speakers with mini size and low volume design, most suitable for side pillows. specificationItem Type: Bluetooth Pillow Speaker Material: ABS Bluetooth: 5.1 Transmission Distance: Approx. 5m/16.4ft Frequency Range: 20-20KHz Memory Card Support: Up to 128GB (Not Included) Battery Type: Built in 400mAh Lithium Ion Battery PackageList 1 xBluetoothPillowSpeaker 1 x Instruction Manual 1 x Data Cable