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50mw 800m Tx,Rx module YS-C20UB	DAR-C8 8CH telephone voice recorder card/automatic call reco	2KM-Distance RF data transmitter (YS-C20L) high speed rate	DAR-C16CH Phone Recorder with SDK/telephone call recorder
Wireless data radio modem with 3 km range YS-C20K	DAR-8CH hidden audio recording devices/call recorder	Low power ,rf module with high speed 1.2~19.2Kbps YS-C20S	DAR-16ch PCI telephone recording card /call recording/analog
YS-C10U high rates RF module (433mhz,17dbm)	Telephone Recorder Introduction(NAR-8000) auto telephone rec	500mw rf module ,data transceiver YS-C30L	DAR-V07 8ch recording+ 7ch voice mail phone recorder
3-4 km range data transceiver -YS-C30K	DAR-V08 8 channel telphone recording card, 8 line voice mail	YS-C30M 5 km 433Mhz data transceiver /tx-rx modules	DAR-V16 telephone recording Card with Voice mail/telephone v