The ATW-1128 Handheld Microphone System consists of an ATW-R11 receiver and ATW-T28 handheld, unidirectional dynamic microphone/transmitter.
Features
True diversity reception and full FM deviation
Choice of 20 VHF frequencies
InvisibleLink¬ circuitry delivers optimum sound quality
Ground-lift switch and adjustable squelch control
Balanced and unbalanced audio output jacks
Receiver mounts in a single 19 in. rack space
Dual-power battery-save switches on transmitters
ATW-T28 handheld microphone/transmitter features a Hi-ENERGY¬ dynamic element with superior internal shock mounting.
Technical Info
System Includes: ATW-R11 Receiver and ATW-T28 Handheld Unidirectional Dynamic Microphone/Transmitter.
1100 Series Overall System
Operating Frequency: VHF high band, 169 MHz to 216 MHz
Frequency Stability ±0.005%, single-frequency crystal-controlled
Modulation Mode: FM
Maximum Deviation: ±30 kHz, traveling frequencies ±15 kHz
Operating Range: 200 ft. minimum
Operating Temperature Range: 40Á F (4Á C) to 110Á F (43Á C)
Frequency Response: 100 Hz to 15 kHz
ATW-R11 Receiver
Receiving System: Dual independent receivers, automatic-switching diversity reception
Image Rejection: >=60 dB
Signal-to-noise Ratio: 95 dB at 10 kHz deviation (IEC-weighted), maximum modulation 15 kHz
Total Harmonic Distortion: <=1% (10 kHz deviation at 1 kHz)
Sensitivity: 10 µV for 60 dB S/N (IEC-weighted)
Audio Output Unbalanced: 350 mV (at 1 kHz, ±10 kHz deviation, 10k ohm load)
Balanced: 220 mV (at 1 kHz, ±10 kHz deviation, 10k ohm load)
Output Connectors: Unbalanced: 1/4 in. phone jack Balanced: XLRM-type
Power Supply: 12-18V DC, 350 mA, with provided AC adapter
Dimensions (W x H x D): 16.93 x 1.92 x 7.28 in. (430.0 x 48.8 x 185.0 mm)
Net Weight: 5.5 lbs. (2.5 kg)
Accessories included: 2 whip antennas, rack-mount adapters, AD1205A AC adapter
ATW-T28 Handheld Transmitter
RF Power Output: 50 mW Max
Spurious Emissions: Under federal regulations
Dynamic Range: >=90 dB
Microphone: Element Dynamic unidirectional
Battery (not included): 9V (NEDA type 1604) alkaline
Current Consumption: 30 mA typical
Battery Life: Approximately 15 hours in High position, approximately 20 hours in Low position
Dimensions
Length: 9.50 in. (241.3 mm)
Diameter: 2.10 in. (53.3 mm)
Net Weight (without battery): 12.7 oz. (360 g)
Accessory included: Stand clamp
Personal use items that are used at your mouth or in your ear cannot be returned once opened due to health laws. This includes all microphones, guitar talk boxes, ear plugs, and in-ear earphones. 
