The flagshig UR2 Wireless Handheld Transmitter offers the most advanced features and controls including a bit-mapped backlit LCD display, infrared automatic transmitter sync and switchable RF power.   It also has frequency and power lockout cabability and can be used continuously for up to 8 hours using 2 x AA Batteries (included). The UR2  is made from an all-metal die-cast construction for maximum durability.