Audio cable (3.5mm stereo jack to 3.5mm stereo jack)  for your JBL speaker docksuch as the following.

Radial
Radial Micro
On Stage
On Stage II
On Stage III
 
Directly connect iPhones, smartphones with the 3.5mm headphone socket to your JBL Radial Micro speaker or other JBL speakers via the Aux input on the rear of the speaker. 

Note: For iPhone 7, 8, 10, X  etc without headphone socket, use our cable adapter:

https://www.ebay.co.uk/itm/164938542736