The power of a lens is +4D. What is the nature of lens

power 4dPower RDW Professional Type NR 8004D dengan memiliki 4 cxxnel, dengan speck 4 x 850 watt di 8 ohm 4 x 1850 watt di 4 ohm 4 x 2600 watt di 2 ohm 3200 watt diSYNCHRO Construction Solution - SYNCHRO 4D Power BI Data Connector - Prerequisites Setting up Global Environments SYNCHRO Control Permissions Using Connector Table