Type: Wireless Bluetooth Headband, Sleep Mask Headphone, 3D Eye Mask, White Noise Headphone, Light Blocking Eye Mask, Sleep Mask This sleep mask features a unique 3D eye contour and a bottom blackout bar that allows you to enjoy uninterrupted sleep from any Angle and experience unmatched shading effects. Features: Deep 3D eye contours provide ample space for your eyes, preventing any pressure on your eyeballs or eyelashes. The Bluetooth 5.3 version not only includes a microphone and speakers for phone calls but also offers a wider connection range and smoother call quality. With 38 white noise options, our sleep mask eliminates the need for additional Bluetooth devices. Offers three timer options to combat daytime fatigue: a 30-minute power nap, a 90-minute meditation session, and a 120-minute deep sleep mode. Experience long continuous audio playback to enhance the quality of your sleep. The adjustable non-stick hair strap accommodates a wide range of head sizes and prevents hair tangling when removing the mask. Specifications: Material: Polyester Color: Black Bluetooth Version: 5.3 Charging Time: 2 hours Music Playback Time: 10-12 hours Bluetooth Standby Time: 15 hours Speaker: 32 Euro stereo Wireless Distance: more than 10 m Standby Power Consumption: 3-10mA Charging Voltage: 5V/0.25V Battery Specifications: 1 x 200mAh Lithium Battery (included) Charging Mode: USB Charging Cable Power Supply (power adaptor not included) Product Size(LxWxT): 60 x 10 x 1 cm Package Contents: 1 x Eye Mask 1 x USB Charging Cable 1 x Manual Please note: Due to manual measurement, there might be a tolerance in the product size.