Catalog > Consumer Electronics > Kits > Velleman Kits Catalog > Consumer Electronics > Kits > Kits (By Function) > Telephone VELLEMAN K4900 Telephone Amplifier Telephone Amplifier Kit • Function Group : Telephone Part No: VELLEMAN K4900 Discontinued Specifications, Prices & Availability may change without notice. Images are for illustration purposes only. E&OE Features This telephone amplifier may be used as a freestanding amplifier with speaker, e.g. to listen to a telephone conversation, or the output may be connected to an amplifier or mixing panel (e.g. radio stations).input: Isolation transformer interfaceSpeaker output: 0.5W / 8ohmLine output: 0dB (0.775Vrms)Power supply: 7 - 9VAC or 9 - 12VDC / 150mAPCB dimensions: 63 x 52mm (2.5" x 2.1") Additional Information Group Telephone Model K4900 PCB Size 63x52mm Power 0.5W Voltage 7-9VAC or 9-12VDC Current 150mA