The OMNITRONIC L-125 is a remote control for adjusting sound volume. It provides volume-up and volume-down functions and switches mute on and off. Power is supplied by one built-in 3.0 V CR2025 lithium-manganese button cell. The unit measures 8.6 cm in length, 4 cm in width and 0.7 cm in height, with a net weight of 0.01 kg. The available product information does not specify compatible systems or optional accessories.