Most listings specify alkaline batteries — either 2 × AA or 2 × AAA. Batteries are required but not included.
They use infrared (IR) wireless technology to send commands from the remote to the player.
The listings show compatibility with Philips TV/DVD combo units and Philips Blu‑ray/DVD players, including controls for TV channels and disc navigation.
Typical dimensions listed are about 1.0 in (H) × 2.0 in (W) × 6.0 in (D), with weights shown around 0.2–0.3 lb.
Yes — one listing specifically mentions support for 4K Ultra HD Blu‑ray playback.
Yes — listings describe them as one‑remote solutions that let you navigate TV channels and disc menus and switch between channel and disc playback without juggling multiple controllers.