This is the Audio-Technica ATW-1101/L, System 10 Wireless Lavalier Microphone System
It includes the ATW-R1100 receiver and ATW-T1001 body-pack transmitter with MT830cW omnidirectional lavalier microphone.
Specifications
Overall System
Operating Frequencies 2.4 GHz ISM band (2400 to 2483.5 MHz)
Frequency Response 20 Hz to 20 kHz
Depending on microphone type
Operating Range 30 m (100') typical
Open range environment with no interfering signals
Total Harmonic Distortion <0.05% typical
Operating Temperature Range 0° C to +40° C (32° F to 104° F)
Battery performance may be reduced at very low temperatures
Handheld Transmitter
RF Power Output 10 mW
Spurious Emissions Following federal and national regulations
Battery Type Two 1.5V AA
not included
Battery Life >7 hours (alkaline)
Depending on battery type and use pattern
Dimensions 254.8 mm (10.03") long,
50.0 mm (1.97") diameter
Net Weight 280 grams (9.9 oz)
without batteries
Accessories Included AT8456a Quiet-Flex™ stand clamp
Body Pack
RF Power Output 10 mW
Battery Life >7 hours (alkaline)
Depending on battery type and use pattern
Battery Type Two 1.5V AA
not included
Dimensions 70.2 mm (2.76") W x 107.0 mm (4.21") H x 24.9 mm (0.98") D
Input Connections Four-pin Locking Connector
Pin 1: GND, Pin 2: INST INPUT,
Pin 3: MIC INPUT, Pin 4: DC BIAS +9V
Net Weight 100 grams (3.5 oz)
without batteries
Spurious Emissions Following federal and national regulations
Receiver
Receiving System Diversity (frequency/time/space)
Maximum Output Level XLR, balanced: 0 dBV
1/4" (6.3 mm), unbalanced: +6 dBV
Power Supply 100-240V AC (50/60 Hz) to 12V DC .5A (center positive) switched mode external power supply
Operating Temperature Range 40° F (4° C) to 110° F (43° C)
Dimensions 190.0 mm (7.48") W x 46.2 mm (1.82") H x 128.5 mm (5.06") D
Weight 290 grams (10.2 oz)
Accessories Included Power supply