The Siemens RIC BTE Pure 3mi (Twin Mic) is the most popular style in their RIC range, and is capable of full wireless and Bluetooth communication. Sporting a size 312 battery, it will last about 7-10 days on a single battery. It also has the unique option of a rechargeable battery, with a dedicated extra charger. Still very small, and in a huge variety of stylish colours, it can support a wide range of hearing losses from very mild to severe. It can be optioned with either a program button or a volume control. In the new Binax range, there is a smartphone app for taking advantage of the specialist wireless features available in the hearing aids.