The Baader Laser Collimator gives very accurate collimation (optical allignment) of all Newtonian and Schmidt-Cassegrain reflector telescopes, essential for getting the most out of your telescope. This particularly well-designed laser collimator represents excellent value and performance at a fraction of the cost of other similar quality laser collimators. It's what we ourselves use when collimating telescopes here at Astrospares! Features: Completely new chassis design with 1/3 smaller diameter for better view of the reflector disc. On/Off switch (rotary knob) with on/off icon Easily accessible battery compartment High quality, shock-proof industrial laser Precision-machiened, hard anodised nosepiece instead of the less exact chrome nosepiece Hand protection made of silicon rubber makes it easier to handle with gloves Coloured gift box With 0.8mm aperture, suitable for collimating some SC telescopes Specification:Weight: 152 gCharge: enough for about 10 hours of operation Brand NewThis brand new item is supplied complete in its original box.