Sony RM-V310 Features:

Controls up to 7 devices: The RM-V310 features direct hard button access to TV, DVD, Satellite, Cable, VCR, CD and Amp devices.

Supports 39 commands per device: The RM-V310 has 47 buttons, a total of 39 usable for in-device commands. This is 4 more than the RM-V402 or RM-V302 and the same number as the RM-VL600 and RM-VL710.

Preprogrammed codes: The RM-V310 includes a large, upgraded database of IR codes for a wide variety of devices including all-in-one home theater systems, analog and digital cable boxes, CD players, DVD players, digital video recorders, HDTV tuners, mini systems, MiniDisc decks, receivers/amplifiers, satellite receivers, tape decks, televisions, VCRs and TV/VCR combos. A built-in code search feature allows for easy code number discovery.

Favorite channel macros: The RM-V310 supports assigning a 4-step favorite channel macro on the 6 transport buttons. Only buttons under televisions, analog cable boxes, digital cable boxes, DSS receivers or digital video recorders can have this feature enabled.

Volume punchthrough: Allows all devices to control either the television or amplifier’s volume controls.

Memory backup: Maintains settings even when batteries are removed.

Sony RM-V210 Features:

Controls up to 4 devices: The RM-V210 features direct hard button access to TV, VCR, Cable and DVD devices.

Supports 50 commands per device: The RM-V210 has 55 buttons, a total of 50 usable for in-device commands. This is 11 more than the RM-V310 and 15 more than the RM-V202.

Preprogrammed codes: The RM-V210 includes an upgraded database of IR codes for cable boxes, DVRs, satellite receivers, televisions and VCRs. A built-in code search feature allows for easy code number discovery.

Memory backup: Maintains settings even when batteries are removed.

Sony RM-EZ4 Features:

Controls 2 devices: The RM-EZ4 controls a television along with a cable box or a satellite receiver.

Supports 22 commands per device: The RM-EZ4 has 23 buttons with a total of 22 usable for in-device commands, one more than the RM-EZ2.

Preprogrammed codes: The RM-EZ4 includes an upgraded database of IR codes for cable boxes, satellite receivers and televisions. A built-in code search feature allows for easy code number discovery.

Ergonomic easy-to-use design: The RM-EZ4 includes large, friendly buttons and a softly rounded shape ideal for those with special needs. The securely latching battery compartment cover is easy to open, and the batteries simple to remove and re-install.

Memory backup: Maintains settings even when batteries are removed.