Audio cable (3.5mm stereo jack to 3.5mm stereo jack)  for your Gear4 speaker dock. 

Directly connect iPhones, smartphones with the 3.5mm headphone socket to your Gear4 StreetParty Size 0 speaker via the Aux input on the rear of the speaker. 

Note: For iPhone 7, 8, 10, X  etc without headphone socket, use the Apple Lightning to 3.5mm socket adapter included with iPhone.