The Sony In-line Stick Remote (RM-MC12ELK) works with most recent Sony MD portables. This unit is backlit and features a cylindrical design with easy access to volume control and other functions. Available in SILVER. FEATURES: This replacement piece will work with all the following models and possibly more: Hi-MD compatible Recorders: MZ-N505 MZ-N707 MZ-R900 R909 R90/91 R700 G750 (disables radio features) R70 R55. Aiwa AM-F90. Players: MZ-E900. E909 E800 E707 E700 E600 E501 E500 E95 E80 E77 E75 E70 E60/62 E55 E44/45 E33. The RM-MC12ELK is not compatible with the MZ-R500 MZ-E300 MZ-R37 and earlier portables