Philips. Digital Voice Tracer with. Dragon NaturallySpeaking. Speech office simply plug the recorder into the PC, transfer your file and let Dragon. Philips Digital Voice Tracer LFH - voice recorder overview and full product specs on CNET. Dragon NaturallySpeaking 10 Digital Voice Recorder Edition. Find great deals for Philips LFH Voice Recorder. Shop with confidence on Product Identifiers. Brand. Philips. Model. LFH MPN. LFH/ UPC.