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. Specification Item 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 Package List 1 x Bluetooth Pillow Speaker 1 x Instruction Manual 1 x Data Cable