This low cost FM transmitter features pre-emphasis, high audio sensitivity (easily picks up normal conversation in a large room), a range of around 100 metres, and excellent frequency stability. Specifications: Tuning range: 88 - 108MHz, Supply voltage 6-12V, Current consumption @ 9V: 3.5mA, Pre-emphasis: 75uS, Frequency response: 40Hz to greater than 15KHz, S / N ratio: Greater than 60dB, Sensitivity for full deviation: 20mV, Frequency stability with extreme antenna movements: 0.03%, PCB. dimensions: 25 x 43mm. Construction is easy and no coil winding is necessary as the coil is pre-assembled in a shielded metal can. The solder masked and screened PCB also makes for easy construction. The kit includes a PCB and all the on-board components, an electret microphone, and a 9V battery clip. NOTE: We do not supply a case for this kit anymore.