*****Description:***** four Channels Control Hoist Crane Remote Control System 2 Transmitters 1 receiver (UP/DOWN/START/STOP) Power Source of Controller:2x1 AA/AAA Batteries Note: Battery is never incorporated *Power Source of Receiver:12V/24V/36V/48V/110V/220V/380V/415V,Please let us know whenever you would like others voltages,or we are ready to ship you the default voltage in identify *Firm and Durable *Working Distance as much as 150m *Working Temperature:-30°C~+85°C *Receiving Sensitivity:115dBm *Protection Grade:IP65 *Non-repeating code up to 4 billion models Application area: Crane/Conveyer/CNC/Coal Digging Machinery/Generator Startup/Concrete Pump/Grab Bucket/Other Machinery Characteristics: *Tiny length very delicate weight *Anti-interference *Long pure life *Long operation distance up to 150M *300 installations in single subject *****Shipping:***** Ship to USA: 7-15 enterprise days Ship to other countries : 10-25 enterprise days