Aputure 2.4Ghz Trigmaster Kit (One Transmitter + 2 Receivers) Radio Remote Flash Trigger and Shutter Cable Release, fits Pentaxist DS, DS2, D, DL, DL2, K10D, K20D, K100D, K110D, K200D, K-5, fully compatible with PENTAX CS-205, CONTAX LA-50 Premium Grade 3-in-1 Multi-Function Radio Trigger for Flash, Strobe and Camera, 2.4GHz Radio Frequency 16 Channel, encrypted 2.4GHz with 360 ft range, Sync Speed of 1/250 sec, when in "flash" mode. Enabled AF with half press of the Remote Button when in "camera" mode, 2 sec, delay function in both modes. In "camera" mode, remote is able to do continuous and "Bulb" by press and hold the trigger bottom for 2 sec, and press again to stop expandable with additional Receiver available for purchase 24 Month Manufacture Warranty