product: wireless data module/rf module: ys-360d antenna impedance： 50Ω; temperature： -30℃~+60℃; air data rate： 1200/2400/4800bps; fsk/msk; carrier frequency: 223 ~ 235mhz; interface：ttl,rs-232,rs-485; frequency stability: ±5ppm ; channel spacing: 25khz/12.5khz; voltage: 12v; size: 96×58×18mm; our company(hongkong huawei international electronic limited) is an industry leader in the design, development and production of high quality security systems and components. our products include dvr cards(include kodicom series,gv series,avermedia series,picaso series,pico series, wdt series and 7130 series,hardware capture card);cameras (include color camera,b/w camera,ir waterproof camera,ir dome camera,dome camera,bullet camera,integrative camera,flying disk camera,and double ccd camera);we also offer ptz;infrared light;decoding series;lenses. telephone recording card(4 ports & 8 ports);telephone recording box(1 channel & 2 channel) wireless data module. you can gain more information from our website:www.hkhuawei.net if you are interested in our products,please contact me. e-mail:sales01@hkhuawei.net msn:yishidvr04@hotmail.com tel:86-755-83756095 fax:86-755-83755169 skype:fansijie1985 yahoo:cristy_fan1985 icq:379622008