Check the listing for details. serial number transmitter 1144C324 Remote Control System HS-6. Condition: New. Listed at 46.00 USD. 220VAC 6 Channels 1 Transmitter 1 Speed6 Channels Control Hoist Crane Remote Control System(ON/OFF/UP/DOWN/WEST/EAST)*Power Source of Controller:2 x 1.5V AA/AAA BatteriesHS just the Model code . Hs-4 , the “4” mean the channel quantity HS-4*2 , *2 mean the quantity of the TransmitterHS-6S “S” mean single speed with Emergency StopHS-6D “D” = Double speed with Emergency Stop *Products and applications *Firm and Durable*Working Distance up to 150m*Working Temperature:-30C~+85C*Receiving Sensitivity:115dBm*Protection Grade:IP65*Non-repeating code up to 4.2 billion sets Application area:Crane/Conveyer/CNC/Coal Digging Machinery/Generator Startup/Concrete Pump/Grab Bucket/Other Machinery Characteristics:*Tiny size & very light weight*Anti-interference*Long natural life*Long operation distance up to 150M*300 installations in single area We provide you brand new and guaranteed quality(CEISO9002CCC certificates)