The GR360 is vertically and horizontally self-levelled by a motor mechanism. Similar features as the? GR360 incorporates a semiconductor green diode for even better visibility under bright condition or large distance. The GR360 has 5 speeds of scanning: 0-60-120-300-6000 rpm and 5 angles of scanning: 0 ? ,10?, 45?, 90?, 180?. The GR360 can be used with a remote control within 20m distance, and detectable by a receiver up to 1200ft (400m) diameter. BEITER?s rotary laser has the 90?plumb dot up and down. It is powered by rechargeable NiMH batteries. The GR360 is IP65, extremely water-proof and dust-proof.