MOOSE / amplification device for phone

MOOSE is a power-free amplification device for I-phones. The device was tested to produce an amplification effect of over four times the e sound volume without electric power assistance through its physical structure that adheres to the principles of amplification, thus achieving its merits of low power consumption and high volume. The appearance was designed to remind its users to pay more attention to the natural ecology and reduce the waste of resources when using electronic products.