Sleep Headphones 3D Sleep Mask Bluetooth 5.0 Wireless Music Eye Mask Sleeping Headphones for Side Sleepers with Ultra-Thin Stereo Speakers Perfect for Sleeping Description: Bluetooth specification:V5.0+EDR/A2DP/AVRCP/HFP Frequency range:2.4026GHz-2.480GHz Transmission distance:20 meters or more Channel:Stereo Speaker parameters:32 ohms / 30mm Speaker power:10 mW*2 Signal to noise ratio:104dB Microphone intercom Play time:13 hours (for apple mobile phone volume test) Talk time:14 hours or more Standby time:350 hours or more Charging time: 2 hours or so Packaged size:18*8.5*3cm Package included: 1*Bluetooth headset 1*Sleep scarf 1*USB charging cable 1*Instruction manual Note: Due to the difference between different monitors the picture may not reflect the actual color of the item. Thank you!