GFT808 Chipset (Gain Tech)S/W Control (Serial Communication)same as Rohm S/W88 ~ 108MHz (US)Full Channel BandChannel Step 100KHzLow CostMute availableFull StereoMono availableBuilt-in pilot tone systemDC 2.5V ~ 3.6VAudio input (20Hz~15KHz)13mm*14mm*1.65mm