YR-04 Stereo 3D Sleep Eye Mask Wireless Bluetooth V5.0 Sleep Headphones, Black, 501 Original

YR-04 Stereo Wireless Bluetooth V5.0 Sleep Headphones Calling Music 3D Sleep Eye Mask Cover Earphone Night Rest Shade Eyepatch HeadsetFeature: 1. Wireless Bluetooth function, music assisted sleep.2. Three-dimensional design, according to the CONTOUR of the face with a comfortable 3D design perfectly fits the face.3. Comfortable, breathable and not stuffy.4. It adopts a curved shading design that completely fits the nose to prevent light from entering and affecting sleep.Specification: Model: YR-04Material: Polyester + cottonColor: Black, PinkBluetooth protocol: V5.0Operating range: 10m/32.8ftBluetooth search name: BT-01Frequency range: 20Hz-20KHzCharging voltage: 3.7V-4.2VCharging current: 150-200mASensitivity: 88dBSignal to noise ratio: 90dBSpeaker impedance: 32Ω±15%Speaker size: Diameter 30mm/1.18inCharging time: 2hDuration of use: 10h (60% volume)Battery capacity: 200mAh lithium batteryPacking size: 190x120x35mm/7.48x4.72x1.38inProduct gross weight: 168gNote:1. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you!2. Please allow 1-3cm measuring deviation due to manual measurement.Package Content:1 X Bluetooth Sleep Eye Mask1 X Charging Cable1 X Instruction