A Wireless Jammer will emit an REP (Redstone Ether Pulse) approximately every 10 seconds. When powered by a Redstone signal the REP will stop.
Wireless Redstone devices hit by the REP will stop working for ~30 seconds, including Wireless Redstone that are held by players.
The bolt may be used to sabotage signals or be used as a form of defence. It harms mobs more than players and will always attempt to target a mob in range.