HTKP-820V HTKP-820S HTKP-824 HTKP-48HD HTKP-66D     • SPECIFICATION SWITCHING PCM/TDM AC INPUT/ EXT BATT. AC INPUT:220V/60HZ EXT BATT:24V/40AH SIZE 590(L)x358(W)x154(H) CAPACITY MAX:66 MAX C.O LINE:18 MAX INTERCOM LINE:60