Evike.com's snap shot feature is the AceTech Brighter C Tracer Unit... "It is the world's first patented design without switch, power on by shaking. With IP64 protection, enjoy the shooting experience in sunny or rainy days. It supports both green luminous BBs and gel BBs, perfectly for all Airsoft night games. Compact and weighs only 32 grams, making it easy to carry and occupying no space. It can be used as a standalone tracer module or put into a mock suppressor. Lithium battery design, can supply 20,000 rounds with one charge. Support up to 35PRS burst speed while still being brighter than ordinary illuminators. Made in Taiwan with FCC, CE, and ROHS certification."