You can take your dream shot from anywhere with this extremely portable mount. No backlash and NO need for counterweights! Description The RST-135 uses a new type of gear called a strain wave gear. Due to the strong force provided by the strain wave gear and motor, a counterweight is not needed. The mount weights only 3.3kg (7.27lbs), but can carry a payload up to 13.5kg (29.76lbs). Rainbow Astro calls this breakthrough mount a Weightless Mount. The volume and weight of the mount is no longer a problem when travelling for astrophotography. NOW AVAILABLE IN MULTIPLE COLOR OPTIONS! NOTE: Colors other than standard gray are a special order and will have an additional lead time. Features Compact and light The mount weighs only 3.3kg (7.27lbs). You do not need a separate bag for the mount: Just put it in your backpack. Equatorial / Alt-Az dual Mount You can easily change between Equatorial mode and Alt-Az mode, allowing for both photographic and visual use of your instrument. No counterweight needed You do not need a counterweight to use the mount and it can carry a payload up to 13.5kg (29.76lbs). Beauty of a machined product Feel the beauty of a machined product. All parts of RST-135 are made by machining a solid block. The RST-135 is the perfect premium mount. Strain wave gear The strain wave gear is a new type of gear that is widely used in industrial robots. There is no backlash. Built-in WiFi This mount has built-in WiFi in the hand controller. You can control and auto-guide the mount without running a cable to your PC. Built-in GPS receiver The built-in GPS receiver eliminates the need to enter your location during each session or if you travel with the mount. Built-in Home sensor The home sensor finds the mechanical origin by itself. This is useful for remote observation. Specifications Mount Type Equatorial / Alt-Az Dual Mount Type of Gear Strain Wave Gear Payload 13.5kg (30lbs) - No counterweight 18kg (40lbs) – Using a counterweight Slew Speed 6º / Second Latitude Range 0º to 90º Power Input 12 to 16V DC Power Consumption 0.2A - Tracking, 16V 3A - Slewing, 16V Weight 3.3kg (7.3lbs) Size(mm) 130 x 120 x 190 Materials AL 6061, Steel, Brass ASCOM Supports ASCOM Drivers Hand Controller Included Additional Function Built-in WiFi Built-in GPS Receiver Built-in Home Sensor