TS22A test set with piercing pin clips. The TS22A Test Set is equipped with all the features of the TS22 Test Set with the addition of a built in two-way speakerphone. The two-way speakerphone enables the user to operate hands free. The effect of ambient noise can be eliminated with the Mute switch, allowing the technician to monitor a line uninterrupted while in Talk mode. A standard among field professionals, the TS22A model is a reliable and durable test set that is ready for any job.