The Brinsea OvaView High Intensity egg candler is designed to be either hand-held or can be left on a work surface. Battery powered for convenience it uses very high output high efficiency LED illumination ? so no bulbs to replace and no concerns about overheating the eggs during inspection. Supplied with a flexible black ring to seal against the egg shell of standard size eggs plus a special smaller ring for smaller eggs. The larger power drain means that 4AA rechargeable batteries are needed (not supplied). The OvaView High Itensity is ideal for monitoring the embryo development of darker and mottled eggs such as marans, quail, pheasant, etc. Like all Brinsea products the OvaView High Intensity comes with a full 2 year warranty.