CH Products BF/BD Series Paddle Controllers. The CH Products BF/BD series of paddle controllers are high precision, contactless controls combining the features of a contactless single axis joystick and a switch. The BF/BD series paddle controllers feature the Hall effect within an innovative design and ergonomic styling achieving robustness, strength and performance. Features ; Benefits. Hall effect joystick and switch function Sculpted ergonomic design Next generation Hall effect technology 5 V operation - dual redundant outputs as standard Industry standard connector IP67 sealed EMC and magnetically shielded - analogue or PWM outputs Effectively zero below panel depth End stackable mounting