Receiver:
Freq. Range: 25 VHF Channels (169.505 - 197.325 MHz)
Frequency Response: 40Hz to 18KHz (+/- 3dB)
Audio Distortion: less than 1.0% (+/- 15K deviation)
Dynamic Range: better than 100dB
S/N Ratio: better than 95dB
Operating Temperatures: 0o C to 45o C
Operating Range: 100m under ideal conditions
Oscillator: Crystal Controlled
Diversity Type: True Space Diversity
Receiver Type: Super Heterodyne
Image Rejection: Better than 60dB
Reception Sensitivity: Better than 15dBµV
Reception Selectivity: +/- 150KHz
Audio Output Adj. Range: -30dB, ctr 0dB, +6dB
Audio Output Impedance: 2.2 k ohms
Power Requirements: 12V DC 300mA
Dimensions: 98.4(W) x 160.4(D) x 47.6(H) mm
Weight: 500g

Transmitter:
Freq. Range: 25 VHF Channels (169.505 - 197.325 MHz)
Frequency Response: 40Hz to 18KHz (+/- 3dB)
Audio Distortion: less than 1.0% (+/- 15K deviation)
Dynamic Range: better than 100dB
S/N Ratio: better than 95dB
Operating Temperatures: 0o C to 45o C
Operating Range: 100m under ideal conditions
Oscillator: Crystal Controlled
Type of Emission: FM
Antenna: Internal Antenna
Microphone Unit: Unidirectional Dynamic
RF Output Power: 10mW
Input Impedance: 8 ohms
Audio Adj. Range: n/a
Battery: 1 (AA)
Battery Life: 8 to 10 Hours with Alkaline Battery
Dimensions: 62mm( D) 221mm(L)
Weight: 213g Without Battery

211VR receiver
31HT microphone/transmitter
Power Supply