The Lumens DC-W80 4K Wireless Document Camera features an extendable shaft with two points of articulation, has a wireless range of up to 49.21' over the 2.4 or 5 GHz bands. This portable document camera has a built-in battery, and can go with you from classroom to classroom. Its wireless capabilities makes it easy to move from desk to desk, so students can share their work with each other.