Kirkland Signature hearing aids are exclusively sold at Costco. As of 2015, the most recent model is the Kirkland Signature 6.0 Premium Digital Hearing Instrument, according to Costco.
Kirkland Signature 6.0 Premium Digital Hearing Instruments are available in 12 different colors, including Stone Gray, Anthracite, Medium Blonde and Light Blonde, as well as transparent primary colors. These digital hearing aids have the ability to stream audio from other devices, such as iPhones, iPods and televisions, directly into the hearing instrument. The Kirkland 6.0 model has the capabilities of 2.4 GHz wireless technology, and it can be supplemented with a clip-on microphone, states Costco.