| Model No. | EC-H3291 | EC-H3091 | EC-H4291 | EC-H4091 |
| Camera Type | Color Smoke Detector hidden Camera |
| Image Sensor | 1/3 Inch SONY SuperHAD CCD | 1/3 Inch SHARP CCD | 1/4 Inch SONY SuperHAD CCD | 1/4 Inch SHARP CCD |
| Effective Pixels | PAL:500(H) x 582(V) 290K NTSC:510(H) x 492(V) 250K |
| Sensing Area | 4.9mm x 3.7mm | 3.6mm x 2.7mm |
| Signal System | PAL /NTSC |
| Horizontal Resolution | 420 TV Lines |
| Min. Illumination | 0.5 Lux/F1.2 | 0.8 Lux/F1.2 |
| Lens Mount | Pinhole Lens 3.7mm/F2.0 |
| S/N Ratio | More Than 48dB (AGC Off) |
| Electronic Shutter | 1/50(1/60) ~ 1/10,000 Sec. |
| White Balance | Auto |
| AGC | Auto |
| I/O Connector | Power : DC Power Jack , Video Output : BNC |
| Video Output Level | 1.0 Vp-p (75 Ohms, composite) |
| Supplied Voltage | DC12V Voltage |
| Power Consumption | Less than 130mA |
| Dimensions | 120 x60mm |
| Weight | Approx. 0.28kg |