· Purpose: Provide line tracking and detection, confirm the relationship between circuit breakers and sockets.
1. Usually, when a new building is completed, it is necessary to check the route of the line. 191CBI has the functions of line search and line fault detection.
2. In a switch box that is not marked or marked, you want to confirm the switch connected to the electrical equipment so that the power can be turned off and the electrical equipment is repaired. At this time, this instrument can be used.

· Applicable voltage: 220V-240V, applicable frequency: 50/60Hz