兼容模型激光接收器LA-D5GNV/LA-D5NV 跟踪距离3-20m 接收精度:距激光线中心±1.5mm以内 长度(mm):120 width(mm) LA-S501D G・LA-501DG Measurement range (m): 3 to 20 Power supply: 3 x AA alkaline batteries (included) (track stand), 4 x AA alkaline batteries (included) (receiver) Protection grade: equivalent to IP54 Power supply (V): 3 x AA alkaline batteries (included) (track stand), 4 x AA碱性电池(包括)(接收器)