Extech RT32 Wireless AC Circuit Identifier (869MHz) with External ProbeExtech RT32 Wireless Remote AC Circuit Identifier Wireless Remote AC Circuit Identifier Virtual electricians helper remotely identifies and confirms correct circuit is opened Combines non contact voltage and light detection with RF (Radio Frequency) transmission technology. It enables a single user to identify mid run wires and to find the breaker that powers a circuit or light fixture without having to connect directly to the wires in the cable. Key