Dahua HAC-T1A21P 2MP HDCVI Fixed-focal Eyeball Camera.About HAC-T1A21P Dahua HAC-T1A21P is a high quality HD(1080P) and SD output switchable Eyeball Camera that contains 2MP of resolution. Its 3.6mm fixed lens can cover up to 20m of distance. This plastic case camera has approximate 65dB of S/N..