4m to 35m Manual Wind up Telescopic Light Antenna Tower Mast with Tripod for Omnidirectional Dipole Fm Radio Antenna Manual telescopic mast with hand crank operation, no electricity required, suitable for outdoor construction, emergency lighting and off-site working scenarios. Reliable self-locking function allows locking at any height, stable and safe, preventing accidental drop or reverse rotation. High-strength rust-proof metal structure, strong load capacity, stable and anti-sway, ideal for long-term outdoor use. Labor-saving hand crank drive for easy lifting and lowering, simple operation, one person can complete height adjustment., Manufacturer: manyuny