people see Batman when looking at him directly. Batman's cowl has sometimes served other purposes. Occasionally, the cowl is depicted as having defense mechanisms such as electric shock or stun gas in order to prevent unauthorized removal (as shown in The Dark Knight, Batman: Hush, Superman/Batman, and Justice League of America #24). In Batman Begins, Bruce Wayne mail orders the materials to build the cowl through a maze of untraceable shell companies. To avoid suspicion, Wayne orders very large quantities of 10,000, each part sent to different locations and under different aliases. However, because some superpowered individuals such as metahuman hitman Tommy Monaghan have the power to see through solid objects, Batman also lines the cowl with lead to protect his identity. That property is absent in The New Batman/Superman Adventures crossover "World's Finest", where Superman saw through Batman's cowl with ease. Batman's cowl has also been depicted with shifting optical lenses that identify suspects' identities as well as their weak points (through medical records), while simultaneously avoiding the possibility of eye identification. The cowl's lenses incorporate multiple vision modes like infrared vision (heat sensors), night vision, and ultraviolet vision, and a digital camera for obtaining pieces of evidence. Also, in The Dark Knight, Batman uses a sonar concept (via Cellphone) introduced by Lucius Fox. This technology is utilized by using echolocation to triangulate objects via cell phones. In Detective Comics #838 (January 2008), it is revealed that Batman also has an echolocation system in the cowl. In Batman: The Animated Series, Batman wears a special motorcycle helmet when riding his Batcycle that is molded with bat ears to accommodate his cowl's ears. In Batman: Arkham Asylum, Batman extensively uses a sophisticated "detective mode" vision enhancement built into the cowl that allows him to see enemies in darkness, including through walls, see their condition and state of alertness, and detect and identify hidden objects and analyze evidence. It also gives him the white eyes while it is activated. One of the cowl's ears carries a high-gain antenna for an internal communication device on the left side of the mask, allowing Batman to stay in contact with his allies. This communication device is capable of scanning police radios and other communication frequencies. It also carries an inertial navigation unit to keep him in balance when facing foes such as the Scarecrow or Count Vertigo. The cowl's Kevlar panels provide a level