... Philips PNX-0107 solution, Added professional stereo recording Chip Products features: Recording format: Hi-Fi Stereo MP3 format Sampling ... 44.1KHz Double directional digital high-sensitivity microphone 5 Optional recording types:PCM, SHQ, HQ, SP, LP, SLP. ... (4G), 2320hours(8G) Support Voice Operated Recording(VOR/VOX) Timer recording: it will start to recording automatically at the appointment time. ...