A developing apparatus is provided in which a replenishment developer when replenished has been electrified to a sufficient extent and can immediately produce an effect of replenishment, with a small consumption of a carrier. The system includes, for example, a first device, a second device and a server. The base transceiver station calculates advance amount to be set to a downstream TRX amplifier based on the reported phase difference. The images provided for display in alignment with the timeline are representative of content presented to the at least one participant at one or more points in time. The LED lighting device also includes a substrate configured on an outer surface of each of the one or more sidewalls of the lamp holder and a plurality of LED light sources mounted on the substrate. The color toner image is transferred onto a transfer sheet.