I used this indoors a few times during the online boom of the COVID-19 pandemic. Operation confirmed. Only the main unit and two cables, no box. As there are no instructions, please purchase if you know how to use it or are able to research it yourself. Because it is precision equipment, I will pack it a little thicker. It will likely exceed 3cm in thickness, so I plan to ship it via Letter Pack Plus. 【The New Standard in Audio Mixing】 Roland's GO:MIXER is an audio mixer that easily connects to smartphones. You can connect a guitar or microphone and mix audio in real-time. 【Multi-functional Design】 This device features knobs for easy adjustment of audio input and is also equipped with a power indicator and peak indicator. It is ideal for music production and streaming. 【Convenient to Carry】 Its compact design makes it easy to carry. It's the perfect item for recording at home or performing on the go. - Brand: Roland - Model Name: GO:MIXER - Color: White - Function: Audio Mixer - Connection Terminals: Guitar, Microphone, Smartphone - Model Number: C4K5534 - Included Cables: USB cable, Lightning cable Thank you for viewing.