Dust-proof and splash-proof structure that protects the main unit from dust and water droplets Applicable receiver: UK-1 Maximum measurement range: Horizontal 50m, Vertical 30-40m (when using the receiver) Length (mm): 225 Width (mm): 173 Accuracy: ±1mm/10m Automatic correction range: ±4° 电源:3 x AA碱性电池(包括) 电源(V):3 x AA碱性电池(包括)