Superior Sounds and Support TF Card: This sound machine white noise features Bluetooth 5.3, TF card support, and is compatible with Android, iPhone, and PC. It offers a full-range sound and active noise reduction for an immersive audio experience Compact & Wide Use: This pillow speaker has a modern design with non-slip silicone, great as a sound machine for office privacy and home use. Its compact form fits easily under pillow and is portable. Perfect as a travel sound machine for adults and baby Six Natural Sound and Three Timers: This under pillow speakers for sleeping offers six white noise and three timers—30, 60, and 120 minutes. All functions are clearly displayed on the LCD screen, allowing customization for relaxation and sleep Aids Relaxation, Easing Entry into Sleep: under pillow speakers for sleep utilize dual bone oscillator units, providing a more natural and immersive auditory experience. They reduce external noise, aiding relaxation and easing entry into sleep Bone Conduction Silent Bluetooth Speaker Under Pillow: pillow speaker utilizes advanced bone conduction technology. Place it under your pillow, adjust the volume, and enjoy music without disturbing your partner. Perfect for side sleepers Long Battery Life Sleep Aid: This mini white noise machine can operate for 8 to 10 hours on a single charge, making it perfect for individuals who have difficulty falling asleep or those who prefer some background noise before bedtime