360° Total Light Blocking: 's Sleep Mask Light Blocking goes beyond a thick face covering; it features pronounced 3D eye contours and a light-blocking strip at the bottom. This design prevents light from penetrating from any angle, ensuring uninterrupted sleep and providing light blocking .3D Zero-Pressure Eye Mask: The deep 3D eye contours provide ample space for your eyes, preventing any pressure on your pupils or eyelashes. It also designed a triangular space for your nose bridge, which is ideal for those with nasal congestion. The mask fits your face comfortably and allows you to breathe easily .5.4 Bluetooth Headband Sleep Mask: The upgraded 5.4 Bluetooth version not only includes a microphone and speaker for phone audio and calls, but also significant improvements in connection range and smoothness. Enjoy smoother, uninterrupted calls and audio playback within a 10-meter range 15-Hour Battery Life & 3-Stage Timer: Enjoy up to two nights of uninterrupted audio playback to improve your sleep. Additionally, our three timer options help you beat daytime fatigue - 30-minute power nap, 90-minute meditation session, and 120-minute deep sleep mode Improved Comfort & Convenience: Our Sleep Mask 38 white noise options that eliminate the need for Bluetooth devices. We've upgraded the headband with increased elasticity to accommodate a wider range of head sizes (20''-27''). Extended Velcro provides a secure fit to prevent pinging, while the upgraded Velcro design prevents hair from getting caught when removing the mask