Simplex Repeater Controller RT-SRC1 for UV-5R UV5R Extend your radio range much Package Include :  RT-SRC1+ X 1  100-240V Universal Charger  ( K ) Adaptor Cable X 1  English User Manual ( Radio not include ) Up to 120 seconds record capacity Works with most popular FRS, PMR, Amateur radios Allows user to change the DTMF remote control password Beep tone disable function by DTMF number ( 67897 . 67898 )