Evolo size doesn't matter. Sound does. Power and lightness are embedded in the evolo's dna. Their aluminum body gives them a stunning appearance and optimum performance. Thanks to their tangle free flat cable with angled jack, you can also forget about messy cabling and stress features unit driver: 2x 8.6mm impedance: 160hm 15% sensitivity(at 1khz): 95 3db frequency response: 20hz-20khz cord length: 1.2m 15% plug: 3,5mm design: feel free to move around and never stay put; string earphones will never fall off. Their pure hi-fi power will stick with you with remarkable stability. All connections are coated with high resistance silicone to add durability and flexibility; making sure that all the usual weak spots withstand long term use. In-line mic and player controls: evolo's come with an in-line mic and a control capsule to switch between hands-free and music control. Hang up, answer, or skip back and forth through your music. Not all functions are compatible with all brand devices. Care and transportation: cables and pockets don't get along, so we're including a hard protective carry case for you to store them in. What's in the box?: 1 evolo earphones. 1 hard carrying case for storage and transport. 2 extra pairs of silicone ear buds, sizes s and l. 1 popclik sticker.