GSM Spy Bug LONGLIFE 20PRO K+ can last for up to 20 days in stand-by mode. It is a very reliable listening device with easy installation and very good quality in standby and call-back performance. The design is similar to the rest of our other LongLife units, focusing on a minimalist look so the device can be very easily disguised.

The sound quality is very similar to the Glite series where we are using a similar microphone but a more advanced chip structure, this unit stays very basic in terms of commands. Voiceback activation is the only command. 

Functions:

• extremely clear sound
• up to 20 days stand-by
• 4 - 6 hours of continuous listening
• VOX call back function

Package contents:

• GSM Spy Bug LONGLIFE 20PRO K+
• charging adaptor
• charging cable
• 3M mounting system

Description
Range: Unlimited
Number of microphones:1
Max. distance from the microphone:10 and more meters
Possibility of non-stop operation when connected to electricity:    yes
Weight: 60g
Dimensions: 45 x 35 x 30mm
Battery life in stand by: 16 - 20 days
Battery life in automatic activation mode: 2-4 days
Battery life in continuous call: 8 - 12 hours
Operators support: all
Voice activation: yes
Vibration sensor activation: no
Call number filter: no
GSM frequency ranges: 850/900/1800/1900
GPRS Upload60,TCP/IP
Working voltage: 3.4—4.2V  DC
Standby current: ≈2.5mA
Start sound-controlling current:≈30mA
Speaking current:≈150mA
Working ambient temperature:-20℃~+70℃
Working ambient humidity:20%~80% RH
microphone attributes:   
Type:Electret Condenser
Direction:Omnidirectional
Frequence range:100Hz ~ 10kHz
Sensitivity:-53dB ±3dB @ 74dB SPL
S/N ratio:X
Size:2.57mm Dia