Kyocera 2100 Series - Manual (Page 13)

Accessories
Use only Kyocera-approved accessories with Kyocera phones. Use of any
unauthorized accessories may be dangerous and will invalidate the phone
warranty if said accessories cause damage or a defect to the phone.
To shop online for a Hands-free Car Kit and other phone accessories, visit
www.kyocera-wireless.com/store . To order by phone, call (800) 211-1537
(U.S.A. only) or (510) 683-4004.