The UF-20TB is the perfect partner for the UF-20S and UF-20R.Fully metal housing houses our latest class leading technology to ensure rock solid RF. Many high end features are incorporated including Low Cut function, the slot in charger keeps the system ready to work at any time. KEY FEATURES 2400 to 3000 selectable frequencies Preset 15 groups each of up to 63 compatible channels Phase-Locked Loop (PLL) synthesized tune Extended dynamic range and smooth frequency response. Adjustable transmission power between Low and High The panel Lock-On function prevents tampering and RF interruption Together with JTS various music instrument mics, headset mics and tie clip mics this bodypack is versatile for all applications. It is designed with slot-in charging feature with two AA NiMH rechargeable batteries. Carrier Frequency: UHF 606-681MHz Controls: Power ON / OFF, AF Level, Frequency (Up / Down), Lock-on Mode, REMOSET ID Pairing, RF Output Adjust RF Outputs: High/Low Option Frequency Deviation: ±48KHz (Peak) Battery: 2x AA Stability: < ±10KHz LCD Display: Group, Channel, Frequency, Battery Status, User Name, GAIN Adjust Bandwidth: 75Mhz Super wideband Freq. Response: 50Hz - 18kHz Frequency Preperation: PLL Synthesized Control