... wireless remote control for Sand blasting process, Primarily for handheld remote control, if coupled with holster, you can string ... system Case: ABS .Power: 10MW Control Distance: 150m without antenna, 500m with antenna. Frequency: 419Mhz Necessary bandwidth:&le,100-200KHz Power: DC9V ... use in a blasting room at close range, generally without the antenna. 2. Appropriate for special coating, in the open ...