Comteks BST-25 synthesized base station transmitter is one of the most advanced, versatile, and highest fidelity IFB, cueing, and remote program monitoring transmitter available today. Especially designed to meet the high demands of the broadcast, film production, and live entertainment industries, this new product represents 25 years of COMTEK know-how as a leader in wireless sound Here are just a few of the COMTEK advantages this product offers: 119 user selectable channels in the TV-5 and TV-6 spectrum (76.2 to 88.0 MHz) to minimize interference with upper VHF and UHF wireless systems. Balanced mic or line level input with 60 dB of control range to accommodate any audio level or can also operate from intercom feed line. Bright, single-window, LED display for exact frequency and channel, VU meter, and special function indicators. Display can be turned off to conserve power when battery operated. Switchable EQ circuit for superb speech intelligibility or full range high fidelity for remote monitoring of mixer output. Audio processing system can operate companded (2:1 compression) or non-companded to accommodate a greater variety of remote antennas Operates off 115 volt AC or 12 volt DC power and can accommodate a variety of remote antennas Single-space rackmounting kit for one or two units for permanent installations applications. Specifications: BST-25 Base Station Transmitter Audio Inputs: Mic: XLR, 600 W Balanced -40 dBV (nominal) Line: XLR, >10 kW Balanced 0 dBV (nominal) Connectors: XLR-3 Female audio input connector for mic and line input XLR-2 Male power input 12 volts BNC type RF output connector Operation Indicators: LED Bargraph VU Meter diplays audio input (modulation) Two Digit Alpha Numberic Diplay show operating channel Five Digit Numberic Display deficient antenna condition  Lock Out Indicator shows tuning has been disabled Antenna: Telescopic antenna mounts directly into top of transmitter  BNC RF output connector for optional external antenna Power Requirements: 12 Volts DC, 300 mA max Frequency Responce: 80 Hz to 15 Khz Audio Distortion: Less than 0.5% at 80% modulation Modulation Limiter: Soft compressor type with high (25 dB) linear overload protection, attack time less than 1ms, recovery time 10 ms Audio Gain Control: Greater than 40 dB Test Tone Generator: 400 Hz 0.05% distortion  Frequency Modulation: 10 kHz deviation for narrow band channels 75 kHz deviation for wide band channels RF Output Power: Set for 50 mW for FCC Part 74 Frequency Stability: Better than 0.002%. digitally synthesized, crystal controlled Operating Radio Frequency: 76.2 to 88.0 MHz Harmonic and Spurious Emissions: Better than 55 dB below carrier Dimensions: 61/2" wide, 13/4" high, 65/8" deep ( a rack-mounting adapter kit is available for standard 19" rackmount) Weight: 44 0z Overall System Performance (with COMTEK PR-25 type receiver) Working Range: 1000 feet typical with pull out antenna, greater range with external antenna on transmitter Audio Frequency Range: 100 Hz to 12 kHz (high pass filter) Harmonic Distortion: 0.5% with nominal input level Ultimate Quieting: 96 dB A-weighted Operating Temperature: -30 to +60 C