1、BONE CONVECTION TECHNOLOGY: Adopting bone conduction technology, effectively protects the eardrum and helps you sleep better, allowing you to enjoy a more comfortable sleep experience. 2、BT CONNECTION: Supports BT connection, no need for cumbersome cables, easy to control the music playback, enjoy your favorite music at any time. 3、COMPACT AND PORTABLE: Sleeping speaker is designed to be compact and portable, easy to carry, enjoy relaxing music time anytime and anywhere. 4、PLUG AND PLAY: Sleeping speaker supports plug and play function, no need to rely on cell phones or other devices. Plug in the card to play music, more convenient. 5、SLEEPING MODE: With sleeping mode, it improves sleep quality and creates a comfortable sleeping environment through relaxing music. Item Type: Sleeping Speaker Material: ABS, PC Weight: Approx. 121g / 4.3oz Speaker Specification: 8Ω 2W Frequency Response: 20HZ-20KHZ Bluetooth Program: For Bluetrum Bluetooth Version: V5.2 Version Small Memory Card Capacity Maximum Support: 32G (Small Memory Card) (Excluded) Operating Distance: 10m / 32.8ft Prompt Voice: English Prompt Voice LED Lights: Red And Blue Status Indicators Operation Mode: Multifunctional Composite Key Battery Capacity: Lithium 500mAh 3.7V (Built In) Charging Method: TYPE C Charging Port Charging Charging Cable Specifications: 30cm / 11.8in Length TYPE C Charging Cable Charging Time: 2.0H Charging Current: DC5V 310MA Charging Voltage: 5V 1 x Sleeping Speaker