Package  Included:<br /> 1* NILLKIN S1 Bluetooth Speaker<br /> 1* AUX Cable<br /> 1* Portable Hook<br /> 1* USB Cable<br /> 1* Sucker<br /> 1* User Manual<br /><br />Features:<br />* Portable design， with a metal hook， can hang on your backpack， bike， so on.<br />* Waterproof IPX4 level， still can enjoy the rain in bad weather.<br />* Built-in NFC function， touch lightly and fast connection.<br />* With a clear microphone， enjoy a hands-free call.<br />* AUX-in connection， multi way to listen to music.<br />* Button control， adjust the volume and songs freely.<br /><br />Specifications:<br />  Brand Name: NILLKIN<br />  Model Number: S1<br />  Optiona Color: Black， Green， Red， Blue<br />  Net Weight (g): 200g<br />  Dimensions (cm): 10.05*9.3*4.35mm<br /><br />Technical Parameters<br />  Microphone: Yes<br />  Connectivity: Bluetooth， NFC， AUX-in<br />  Bluetooth Version: Bluetooth CSR4.0<br />  Transmission Distance: ∵10m<br />  Rated Power: 3W<br />  Speaker Specification: 42mm 4? 3W<br />  Bluetooth Mode: A2DP/AVRCP/HFP/HSP<br />  Audio Format: MP3/WMA/WAV/FLAC/APE<br />  Channel System: Single Chaneel<br />  SNR: ∫75dB<br />  Distortion:  ∵1%<br />  AUX: 3.5mm audio port<br />  Power Input: 5V/500mA<br />  Power Interface: USB micro<br />  Frequency Range: 2.24GHz-2.48GHz<br />  Frequency Response: 80Hz-20kHz<br />  Battery Capacity: 800mAh<br />  Working Time (h) ∫5H(depends on volume and audio content)<br /><br /><br />Fashion，Mini，Waterproof，Cars，wireless，Speakers，Musical Instruments，waterproofspeaker，bluetoothaccessorie，Bluetooth，Shower