This upgrade enables you to extend the battery tube of your SUNWAYMAN V10R, V11R, M10R, and M11R, so it can run off a single AA battery. Your V10R will function as a SUNWAYMAN V10A. Using an alkaline AA battery, your variable output ranges from 140 lumens to 1 lumen.
It is convenient and easy to install; it simply screws onto your battery tube. Order today and expand your possibilities.