Wireless Bluetooth Stereo Speaker makes sure the best sound quality with 36MM diameter speaker. It supports hands-free call. It is also a power bank, you don't have to worry that your phone is power off. What's more, Sweatproof and portable design is suitble for outdoor sports, like hiking, traveling, climbing ect. <br><br><strong>Features:</strong> <br>Compatible with almost all Bluetooth-enabled mobile devices such as, for iPhone6 6Plus 5S, for Samsung Galaxy S5 S4 S3 / Note 4 3 2, for HTC One, Tablet PC, Laptop, etc.  <br>Super easy and fast paring with your smartphone or other Bluetooth device for high-fidelity stereo music, movies and chatting. <br>36MM diameter speaker makes sure the best sound quality. Serve as a Power Bank, it can charge most devices with rechargeable 4000MA battery. <br>Supports hands-free call. <br>Wireless Bluetooth Speaker provides 15 hours Music playing time. <br>Sweatproof and portable design is suitble for outdoor sports, like hiking, traveling, climbing ect. <br><br><strong>Specifications: </strong>   <br>Type: Wireless Bluetooth Speaker <br>Bluetooth Version: 3.0 <br>Transmission Power: CLASS2-4dBm <br>Wireless Working Frequnecy: 2.4GHz <br>Signal to Noise Ratio: &gt;=90db <br>Working Voltage: DC 3.7V <br>Battery Capacity: 4000MA <br>Charging Time: about 4 hours <br>Power Output: 5V 1A <br>Speaker Power: 3W <br>Music Playing Time: 15 hours <br>Wireless Range: 10-20m <br>Speaker Size: 12.4 * 4.3 * 4.3cm / 4.88 * 1.69 * 1.69in <br>Speaker Weight:172g 6.03oz <br>Package Size: Approx.18 * 6.5 * 5cm / 7.09 * 2.60 * 1.97in                     <br>Package Weight: Approx.206g / 7.16oz  <br><br><strong>Package List:</strong> <br>1 * Speaker <br>1 * Hang Rope <br>1 * User Manual