CHRONOPEN AIS watch cleaning penChronoPen Premium cleaning pen for watches Take care of your watch with precision. The ChronoPen by AIS Collective is a cleaning pen designed to easily maintain your watch and its straps. Thanks to its ultra fine brush and specially formulated solution, it removes dirt accumulated in the most difficult to reach areas, while respecting delicate surfaces. A simple, precise, and effective tool to keep your watch impeccable every day. Clean your watch