Our flagship TS40 Series Test Sets combine rugged DropSafe, DataSafe, waterproof durability with powerful testing capabilities. Built for the demanding professional, the TS40 Series Test Sets combine an ergonomic waterproof design, DropSafe durability and a standard 3-year warranty for unmatched reliability. The TS40 Series Test Sets offer speakerphone capability for true hands-free conversations, a rugged ergonomically designed waterproof case that exceeds American Military Specification MIL-STD-810E and are DropSafe tested to 20 feet onto concrete. Designed with superior high-impedance monitor to protect data lines, the TS40 Series offers the best DataSafe protection in its class. Advanced testing functions for low/high voltage and low (mA) current detection are displayed in easy-to-read LEDs. Always-on Monitor Mode simplifies operation and speeds testing; just clip on to the pair and it is monitoring.