More details you can see from the video:                                                           Always with you regardless of climbing， walking， fishing                                                       Take it .  It is time to go out .                                                     <br>Description:<br>   Compatible with: Most of mobile phone and tablet PC with bluetooth.   Volume output: 3Watts  Total peak value output: 6Watts at &amp;lt;10% THD  Speaker Specification: 50mm micro speaker， *4Ohm   Decibels: 75dB   Operating Frequency: 60Hz-20kHz   Charging Voltage: USB or AC\/DC adaptor 5V   Audio Specifications: 68*45*92(mm)    Product Weight: 107g   Bluetooth Version: 3.0   Power Capacity: 500mAh   Battery Charging Time: 2 hours  Continuous playback time: Up to 6 hours (Or vary due to environment)  Optional Color: Blue， Green， Purple， Yellow， Red.    Features:<br> Special buckle design， easy to buckle on the speaker to your backpack.<br> Loud and clear voice， also suitable for outdoor use. Bulit-in microphone， easily turned into handsfree. Bluetooth speaker， just need you touch the phone gently and connet it.<br> Waterproof function: Protect from the wet environment and dropping outdoors.<br> Long Play time and enjoy the holidays.<br>  <br>  Package Included:<br> 1 X Bluetooth Speaker 1 X Carabiner 1 X Cable