Listening to music while doing sports gives you optimal enjoyment and good health. Arealer X20 is a high-performance Bluetooth Headphone、 which is specially designed for music lovers. Arealer X20 is characterized by Advanced Bluetooth 4.1 technology、 Built-in high-grade microphone &amp; speaker、 hands-free function and lightweight design. Its hands-free function can set free your hands from answering the call during exercise &amp; travel. What&#39;s more、 the high-performance built-in microphone and speaker offers you gorgeous sound quality. Its lightweight and compact portable size is perfectly suitable for jogging、 mountain-climbing、 traveling、 hiking and other sports. <br><br>What is Arealer?<br>Arealer is a new &amp; professional Headphone Brand、 Arealer Headphone is a High-grade Stereo Bluetooth Music Headphone、 coming from professional Bluetooth Headphone manufacture、 which uses Advanced Bluetooth 4.1 module、 high-grade microphone &amp; speaker and high-performance built-in rechargeable lithium battery、 offering fast-transmission speed and stable performance、 wonderful sound effect、 long standby time.<br><br>Arealer X20 Features:<br>[Advanced Bluetooth Technology] X20 Headset uses renowned Stereo Bluetooth 4.1 chip to ensure super-fast data transmission and stable performance.<br>[Super Sound Quality] X20 Headset uses high-performance Speaker、 offering you high-quality audio、 letting you greatly enjoy excellent stereo sound music effect.<br>[Convenient to control your music and calls] X20 Headset is equipped with function buttons which lets you easily controlling your music. It also supports hands-free with high-grade microphone、 thoroughly setting free your hands from answering the call during exercise.<br>[Integrated Multi-Point Technology] X20 Headset Can simultaneously connect two smarts phone. So you can seamlessly switch between your business and personal phones. <br>[Comfortable Wearing] Use creative ergonomics design、 flexible neck-strap、 lightweight; the adjustable hooks can be fixed stably when you are running or doing other activities.<br><br>Offers Much More Convenience:<br>* Compatible with almost all Bluetooth-enabled mobile devices such as、 for iPhone 6S iPad iPod、 for Samsung Galaxy S7 Note 5 other Android / iOS Smart Phones、 Tablet PC、 Laptop、 etc.<br>* Built toward US Military standards for rain、 sweat、 shock and dust resistance (IP54 rated).<br>* The iOS device can show battery remaining capacity clearly.<br>* Up to 3 hours of continuous Music and 4 hours of Talk Time、 90 hours of Standby Time per charge cycle.<br><br>Arealer X20 Specifications: <br>Brand Name: Arealer<br>Model Number: X20<br>Bluetooth Version: Bluetooth 4.1; Class 2.<br>Supports HSP、 HFP、 A2DP、 AVRCP protocol.<br>Operation range: Up to 10 meters<br>Microphone Sensitivity: -42 dB<br>Response Range: 20-2000Hz<br>Sensitivity: -85dB at 0.1% BER<br>Impedance: 32|?<br>High-quality 3.7V / 60mAh Rechargeable Li-ion battery<br>Music Playing Time: 3 hours (The Music Volume will affect the time)<br>Talk Time: 4 hours<br>Standby Time: 90 hours<br>Charge Time: 1.5 hours<br>Charge Port: Micro USB<br>The Cable length: 57cm<br>Color: Black+Blue<br>Main Item Weight: 14g / 0.49oz<br>Package size: 10.7 * 10.7 * 3.4cm / 4.21 * 4.21 * 1.34in<br>Package weight: 100g / 3.55oz<br><br>Package List:<br>1 * Arealer X20 Bluetooth Headset<br>1 * USB Cable<br>2 * Pair of Earbud<br>1 * Shirt Clip<br>1 * English User Manual