Very good bug for when you need that extra distance.It has 2 power modes, low and high,normally you would use it on the low power setting but when you find that you need that extra little distance turn it to high power.
Come with a neat Sanyo mini cassette recorder which also has Voice activation so you can record only the main parts of a conversation.

Specifications

Transmitter

Frequency 347MHz ~ 353MHz (single channel)

Output power Lower power 12mW
Higher power 25mW

Power consumption Lower power 7mA
Higher power 25mA

Dimensions 31.5×16.4×19.5mm(without antenna and battery)

Mic sensitivity -63 db

Mic pickup power 15m

Switch 1 Power off 2.Low power 3.High power

Transmitting distance Low power around 100-150mtrs(line of sight)
High power around 300-500mtrs(line of sight)

Recorder

Power Consumption 25mA in standby mode
80mA in recording mode

Batterys AAA x 2

Record modes Automatic voice controlrecord / Semi automatic record