Your price: $134.95PA Quantum 70A programmable ESC with Switching BEC PA Quantum Pro line feature outstanding quality backed by equally outstanding service since 2003. The Quantum Pro range has developed over the years and has proven to be reliable and efficient. Unfortunately, however, this success has also attracted companies who have sought to copy our ESC. Customers are being confused by similar packaging and instruction manual. Some vendors are suggesting these copies are in fact PA Quantum, or produced at our manufacturing facility. Beware of these cheap copies!! BAD ESC = CRASHED PLANE.