It comes with 2 brush heads including the ProResults Standard (daily, all-around cleaning) and the ProResults Compact (more focused clean /cleaning hard-to-reach places). There are also 3 additional brush heads that fit the wand sold separately including the EasyClean, HealthyWhite and Xtreme brush heads.
It only comes with 1 replaceable brush head.
It only comes with the Oral-B Precision Clean brush head. However, there are 8 additional brush heads that fit the wand (sold separately) including the Oral-B FlossAction, the Oral-B Pro White, the Oral-B Sensitive, the Oral-B Dual Clean, the Oral-B Power Tip, the Oral-B Ortho, the Oral-B Braces Care Essentials Pack and the Oral-B Tongue Freshener.