Sony RMT-AM420U Remote Commander is the remote control specified for Sony home audio systems, letting you operate the system from a distance during everyday listening and playback.
The operating instructions identify this exact model and state a DC 3 V rating. The manual describes its home audio system as supporting music and video playback from discs or USB devices, radio listening, TV sound and Bluetooth music streaming, giving a sense of the system functions the remote is intended to accompany.
The manual’s supplied-accessories list includes one RMT-AM420U remote control and two R03 AAA batteries rated DC 1.5 V. That documents the remote’s original system package; it does not establish that batteries are included with this separately catalogued item.
