TWGs offers both wired and wireless Anti-Two Block (ATB) switches. The wired Ultimate ATB switch provides added protection against two-blocking situations for crane operators and ground personnel, such as a smaller footprint on boom heads, easy cable replacement, no-hassle mounting flexibility, and less cable wear. The wireless ATB is available both connected to our LMI computer or as a standalone product. It incorporates a custom-designed lithium battery for long life and is rated for extreme conditions -40℉ to 185℉ (-40℃ to 85℃), much higher than alkaline batteries.