This is the only telephone recording connector that will not cause a hum, buzz or background noise on digital recorders. It also provides a solid leveling of the voices between the conversations. If you are trying to record calls and have a lan line this adaptor will work for olympus digital recorders, Philips digital voice recorders and sony dictation recorders.
The TP911 has its own power supply that grounds the telephone pickup to eliminate buzzing or humming produced by interference and ground loops.
Manufactured and tested to work with all digital products that use a 1/8" or 3.5mm jack. Perfect for voice activated recording of phone calls on digital recording units.