The RIC 312 is the mainstream wireless RIC device from Starkey. It uses a 312 battery and has a programmable onboard volume control. In the latest Z series, this style has wireless bluetooth compatibility via the Surflink mobile, although uniquely in this industry it can be held in your hand or pocket, and doesn’t need to be worn around the neck. It comes in a variety of colours and can fit up to a severe hearing loss. The i90 series are at the upper middle segment for hearing aid technology featuring an array of technologies to provide great clarity and listening comfort in most situations. Featuring 12 processing channels and a highly adaptive automatic programme, the i90 series is recommended for those with an active lifestyle. Starkey hearing aids differ from other manufacturers by allowing most of their hearing aids to classify and adapt to up to 7 different environments. The difference between technology levels affects how much adaptation the hearing aid can do when it detects each environment. The i90 level can apply noise reduction through 3 steps.