Trembo Trunks is an upcoming product that may just be the most versatile and easy way to listen to your portable music device. The powerless speaker design comes from two designers located in Sydney, Australia.

You can simply plug Trembo Trunks into your mobile music device in order to use it. The architecture of the speakers allows amplification of up to 80dB, which is pretty astonishing for powerless speakers. This volume level is capable because of the shape and material in the speakers. The speakers are also waterproof, shockproof and virtually indestructible from everyday use, so they can be used for a very long time.

The Trembo Trunks are still a patent, but with its versatility and awesome design, there is no doubt that it will be hitting stores soon.