Review on Vanzon Climber-Z 30W Bluetooth Speaker: Portable, Waterproof, Super Powerful Bass - Perfect for Parties, Travel, Home & Outdoors! by Mike Ogunlana

Bought a speaker for my husband for Christmas but the volume was terrible. This 3D speaker is AMAZING! In the second picture you can see that the volume knob on the top of the speaker is an easy twist. It also doubles when you press it to pause music and make/take calls. It interacted with my cell phone with no problems and maintained a strong connection. In the first picture you can see that the on/off function as well as the up/down function are easy to find. The speaker is supposed to allow you to connect to other devices on the same speaker, but I haven't tried that. The third picture was the most important for me. It had a solid rubber speaker ring so you don't get any vibrations, just pure music!