The Shure PSM 900 personal monitor system provides you with exceptional audio quality and reliable RF performance. With 20 compatible frequencies per band and a 36MHz to 40MHz tuning bandwidth, the PSM 900 gives you the flexibility to handle even the most demanding stage environments. The patented Audio Reference Companding and transmitter linearity deliver pristine sound, while the patented CueMode functionality allows you to quickly save and recall your preferred mix. The PSM 900's rechargeable bodypack receiver and SE425 earphones provide hours of comfortable listening so you can focus on your performance. For professional in-ear monitoring, the PSM 900 personal monitor system has the features and fidelity you need.