Bluetooth 4.0， the NFC compatible receiving， it can be compatible for smart phones， tablets， PCs and other devices capable for streaming Bluetooth audio<br />Great for outdoor and shower - The silicone cases and interface design ensure Shockproof， Dustproof Waterproof， level up to IPX67<br />Features Near Field Communications (NFC) technology which allows for easy， one-touch pairing by simply tapping your NFC-enabled Bluetooth smart device on the speaker<br />Installed rechargeable lithium-ion battery delivers up to 10 hours of playing time on a single charge. Charges fully in just 2-3 hours / Rechargeable via USB cable (included).<br />Built-in Bluetooth Technology - Stream Music Wirelessly - Works with Virtually any Bluetooth-Enabled Device (Smartphones， Tablets， PCs， MP3 Players， etc.)<br />Size: 85 * 87 * 34mm<br />Rated power: 4Ω 3W<br />Charging interface: Micro USB<br />Connection: NFC， Bluetooth 4.0<br />Speaker specifications: 50mm<br />Waterproof rating: IP67<br />Output: DC5V 0.5A-2.0A<br />Frequency response: 200HZ-20kHZ<br />SNR: ≥75db<br />Bluetooth range: 10 m<br />Operating frequency: 2.4GHZ-2.48GHZ<br />Battery: Polymer battery (600mAh 3.7V)<br />Charging time: 2H<br />Playing time: 6-12H<br /><br />Note: After the Bluetooth device is disconnected and inactivity in five minutes， it will automatically turn off.<br /><br />Package:<br />Speaker*1 <br />Carabina*1 <br />USB Cable*1 <br />English Manual*1<br /><img src="http://img6.eachbuyer.com/x9/p100/ci092_1.jpg" />                                                        <img src="http://img6.eachbuyer.com/x9/p100/ci092_2.jpg" />                                                        <img src="http://img6.eachbuyer.com/x9/p100/ci092_3.jpg" />