Our sports headband featuring a headband design with wireless speakers inside also plays the role of wireless earphones with wireless V5.0 technology to provide wireless music playing function and hands-free calling function after paring with your phone and sleep mask to help you fall asleep by block out light effectively. Built-in advanced chip set and 3.7V 180mAh li-ion rechargeable battery, it can allow you to enjoy 10hours’ unstoppable music time with it is crystal clear stereo sound quality after 2 hours’ full charge. Additionally, made from skin-friendly and breathable fabric, it can provide you a super comfortable wearing experience. And you can wash it after removing the speakers inside. *WIRELESS EARPHONES & SPORTS HEADBAND & SLEEP MASK: Featuring a headband design with wireless speakers inside, our sports headband also plays the role of wireless earphones with wireless V5.0 technology to provide wireless music playing function and hands-free calling function after paring with your phone and sleep mask to help you fall asleep by block out light effectively. *CRYSTAL CLEAR SOUND: Built-in advanced chip set to ensure impressive crystal clear stereo music without loss when sleeping, running, or practicing yoga, although the headphones are in the sports headband. And it can be paired with any phone (with iOS or Android system) with wireless-enabled function. *SKIN-FRIENDLY AND BREATHABLE FABRIC: Made from 92% spandex and 8% cotton fabric and offering mesh lining, our headband features soft, skin-friendly, breathable, sweat-absorbing, dry fast and lightweight to provide you a super comfortable wearing experience. *LONG BATTERY LIFE: Built-in 3.7V 180mAh li-ion rechargeable battery, after 2 hours’ full charge, our earphones can provide approx. 10hours’ unstoppable music time and approx. 100 hours’ standby time. *FULLY WASHABLE AND UNIVERSAL FITS: Built-in detachable thin speakers (only 0.32inches thick), our headband is fully washable after removing the thin speakers inside. And it is stretchable to snugly fit most people with head circumference about 19.3in. Brand: iNOVA Product Type: Wireless Sleep Headphones Material: 92% Spandex 8% Cotton Head Circumference: 49cm/19.3in With Slight Elasticity Wireless Version: V5.0 EDR Transmission Range: ≤10m/32.8ft Operating Range of Microphone: ≤1m/3.28ft Frequency Range: 20Hz-20kHz Battery: 3.7v 180mAh Li-ion Rechargeable Battery Charging Time: 2 Hours Continuous Working Time: Approx. 8-10 Hours Standby Time: Approx. 100 Hours Driver Unit: Φ20mm Impedance: 32Ω Mic: 40dB Item Color: Light Blue Charging Cable Length: 30cm/11.82in Item Size: 23.8x6.5x1cm/9.37x2.56x0.4inches Item Weight: 48.5g/0.11lbs Packaging Size: 6.3x2.2x9.3cm/2.49x0.87x3.67inches Packaging Weight: 68.5g/0.16lbs 1 x Wireless Sleep Headphones 1 x Charging Cable