1、Dual Distance Meter: Dual distance meter can measure horizontally and vertically at the same time to meet different measurement needs. Unidirectional measuring distance up to 100m, bidirectional measuring distance up to 200m. 2、Bi Directional Optical Device: Bilateral measurement tool has a powerful infrared and anti interference lens, so that the signal transmitting and receiving capabilities are enhanced. 3、Bi Directional Reference: During the measurement process, the center point of the measuring object can be positioned, making it unnecessary to bend down to measure either horizontally or vertically. 4、Magnetic Design: The back side is magnetically designed, which can be easily adsorbed on steel columns, handrails and other metal surfaces, which is convenient and space saving. 5、Convenient Battery Power: Features a 3.7V polymer battery (850mAh included) that ensures reliable power for up to 8000 measurements in single direction or 5000 measurements in dual direction on a full charge. Item Type: Distance Meter Material: Alloy Steel Battery: 1 x 3.7V Polymer Battery (850mAh included) Maximum Measurement Distance: Single Direction: Approx. 100m / 328.1ft, Dual Direction: Approx. 200m / 656.2ft Auto Power Off: 180s Backlight Time: 60s Working Time (fully charged): Single Direction 8000 times, Dual Direction 5000 times Operating Temperature: 0°C to 40°C Storage Temperature: -20°C to 60°C Size: Approx. 115 x 50 x 24.5mm / 4.53 x 1.97 x 0.96in 1 x Distance Meter 1 x USB Cable 1 x Reflective Plate 1 x Hanging Rope 1 x Storage Bag 1 x Instruction Manual