Xcortech all New Advanced Design and Innovation for the BB Tracer unit. Brightest: Compared traditional tracer unit use all new technology with high Power UV LED. Low power consumption: High-efficiency design batteries last up to 120,000 rounds. Intelligent: Build in 3D motion sensor to detect user moving to save power.

Colour: Black Diameter: 37mm Length: 156mm Threads: 14mm CCW Material: Aluminum Weight: 140g (without battery) Batteries: 4x AAA's Alkaline or Eneloop (Not included)