The NEW Aurora A4Pro is made of TC4 titanium alloy. as known that titanium is anti-corrosion. non-toxic. high strength. etc.. it's lightweight (24g). and durable. The A4 Pro uses a light orange peel reflector that makes the light have a more focused beam. And the fitted tritium vial fob size is 1.5mm (diameter) x 6.0mm (length).

At the tail loop. besides the 2 tritium slots (size is 6.0mm x 1.5mm). there's also a new construction to install a magnetic tail base (RA30) so that it could attach to a metal surface in a working environment. The included pocket clip is two-way and magnetic. 

It uses a 330mAh battery and charges via the USB-C port. to prevent accidental activation that could drain the battery. a lockout mode was added. 

Accessories; User manual. Warranty card. Keyrings*. Magnetic Pocket clip. Magnetic tail base.
NOTE: attaching the keyring onto the tail loop and clipping the pocket clip might cause scratches. this is not under warranty.