SOM-B1 Uses imaging/Infrared tracking (IR Seeker) at terminal stage, it’s range is 250KM.
SOM-B2 uses dual-Stage penetrator to penetrate deep into strategic targets such as enemy HQ or Depot/Underground Jet Facility.
SOM-J is being developed for use inside weapon bays, will be miniaturized as well as will have a lesser range of 180KM. If Pakistan, in near future decides to take J-20/J-31 as well before AZM, SOM-J could be pursued.
All these variants mentioned above are connected to Data link and can be guided at terminal stage.