In order to control iCA FLASH using the iCA Cam, your iOS device has to be capable with Bluetooth 4.0.
The newest Bluetooth4.0 chip is loaded on iCA FLASH.
Bluetooth4.0 allows low electricity consumption but it is incompatible with the Bluetooth3.0.
For this reason, you cannot control the iCA FLASH on iPhones which are not capable with Bluetooth 4.0.
Compatible iOS devices：iPhone4s / iPhone5/5s/5c / iPod touch 5th generation or newer、Other iOS devices which are capable with Bluetooth4.0