The ITS-ELW8 will pick up sound through a wall, window or door without interference from unwanted surrounding noise.
The ITS-ELWT is a listening through wall amplifier with a high power transmitter built-in.
Operation is versatile:
• It may be used for instantaneous monitoring
• It may be used as a permanent through wall amplifier and transmitter
• By removing the through wall external microphone, its own internal    microphone will switch on and the unit will operate as a high power room    transmitter.

SPECIFICATIONS:
ITS-ELW8
MICROPHONE : External contact type
POWER REQUIREMENTS: 9V PP3
OPERATING TEMPERATURE :-10 to +60°C
SIZE :20 x 60 x 115mm

• On/off volume knob
• Microphone, earphone and record sockets
ITS-ELWT
FREQUENCY RANGE: 135-220MHz (VHF) / 350-960MHz (UHF)
POWER OUTPUT: 250mW
FREQUENCY STABILITY: 0.0005% of assigned channel
MODULATION: Narrowband FM
DEVIATION: 2.5KHz (VHF) 5KHz (UHF)
ANTENNA: External semi-flexible cable
MICROPHONE: Internal electret or external contact
Power: 9V PP3
Operating temperature: -10 to +60°C
Sizes: 20 x 60 x 115mm

FEATURES:
• On/off volume knob
• Earphone socket
• Antenna socket
• Internal or external microphone selection