Item type: Sleep Mask Material: 70% Polyester +30% Chinlon Cool Fabric Bluetooth Function: V5.2, with EDR/A2DP/AVRCP/HFP Bluetooth Transmission Range:20M/66Ft Rated Power: RMS 10mW x2 Speaker Unit: 32Ω/20mm Frequency Response:20HZ-20KHZ Battery:3.7V/400mAh Li-Polymer Battery Music Play Time:20 Hours Charge Time: 5V Approx 2Hours. Package Includes: 1Pcs x Headphones Headband Wireless 1 x USB charging cable 1 x instruction manual Sleep Mask with Bluetooth Headphones,Sleep Headphones Bluetooth Sleep Mask 3D Sleeping Headphones for Side Sleepers Best Gift and Travel Essential Timer setting & 20 White noise Note: 1.Due to manual measurement, lighting shooting reasons and the real thing will be slightly different, please understand. 2.If you are not satisfied, please contact me immediately! 【Sleep Headphones & Bluetooth Sleep Mask & Sleep Eye Mask 3 in 1】Sleep mask with bluetooth headphones features a sleep mask designed with wireless speakers headset inside,the bluetooth sleep mask combines eye mask and headphones that pefect as sleep headphones.The sleep mask headphones allow you to enjoy hands free music during your sleeping time and protect you from being disturbed by your mess hair. Bluetooth eye mask is perfect for nap,insomnia, air travel, meditation and yoga 【Timer setting & 20 White noise】We designed 2 modes: bluetooth music and white noise. It can be used in various scenarios such as exercise, meditation, and sleep at the same time. Built-in 20 soothing sounds and 4 relaxing music. With 30,60,120,180,240 miuntes timer setting function. They block out ambient noise without using sleep ear buds that are painful & fall out 【Bluetooth 5.2 Wireless Connection Earphones】Bluetooth sleeping mask headphones feature with latest Bluetooth 5.2 chip: fast paring speed and less power consumption. Bluetooth sleep headphones can pair with any Bluetooth-enabled device that's within 66 feet, Compatible with Most Devices.The bluetooth sleep headphones wireless music eye mask also allows you to listen to music without wearing additional headphones, which make you fall asleep faster 【HD Stereo Sound and Long Battery Life】 The bluetooth sleeping mask with High-fidelity stereo sound, which produce great sound quality and provide a well-closed and immersed environment for your ears, just lose yourself in the music! The Sleeping headphones Bluetooth sleep mask headphones charge only about 1-2 hours and provide 15-18 hours playing time, support a whole night. Please move the speakers to align the ears so that you can hear more clearly while using 【3D Contoured Bluetooth Eye Mask】Based on ergonomics, Sleep headphones bluetooth sleep mask is perfect for our face.The contours of the eyes area are deeper and your eyes can move freely. Zero pressure on eyes, the 3D bluetooth eye mask for sleeping perfectly solves the tightness of the flat eye mask,bring you a comfortable and long-lasting sleep. With adjustable strap the bluetooth sleep mask fits all size head, easy to adjust and not catch hair.Best sleep headphones for side sleeper