An 14 LED insert for the Duo LED lights. IMPORTANT NOTE: This model is INCOMPATIBLE with Duo and Duobelt lights manufactured before January 1 2004 because the module is polarised and is not reversible in the reflector. It will also not work with the ACCU DUO headlamp. In addition: If the headlamp is used with AA batteries or rechargeable AA batteries, the batteries must be reversed in the battery box for the 14 LED module to work.