professional for export,through the FCC Authentication 3C Authentication.Guarantee of quality.1.Coaster pager2.Frequency :402-470Mhz, PLL,Pocsagsupported.3. Alert ways: Sound, Viberate, Led.4. Coverage:500mUse Lithium battery same as with iPhoneReliable reception rate with RF one chipAvailable printing body sheet logoSelected good design productSuitable for Restaurant, Coffee shop, Hotel, Outdoor bar, Nightclub, Casino, more.