OMNITRONIC Remote Control for EP-220PS Preamplifier is a battery-powered remote control designed for operation of the EP-220PS preamplifier. It uses one built-in CR2025 3.0 V lithium manganese button cell. The remote control measures 4 cm in width, 8.6 cm in depth and 0.6 cm in height, with a weight of 0.01 kg. The battery is included in the delivery.