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 that of our other LongLife units, focusing on a minimalist look that allows the device to be easily disguised. 

LongLife series 20PRO K+ is a compact, long-lasting GSM listening device built for professional-grade remote audio monitoring. It comes equipped with an extended Knowles microphone for superior sound clarity and more flexible placement. With a standby time of up to 20 days, it is ideal for installations where consistent power supply is unavailable but high-fidelity listening is essential.

Key Features:

• Extended Knowles Microphone Equipped with a high-sensitivity Knowles microphone on an extended cable, allowing precise placement and capturing exceptionally clear audio even in concealed installations.
• Long Standby Time Operates up to 20 days in standby mode thanks to a built-in 1200mAh battery.
• Call-Back Function Automatically calls your phone when voice is detected; configurable for discreet monitoring.
• Adjustable Sensitivity Fine-tune voice detection according to your environment and security needs.
• Extended Listening Supports up to 10 hours of continuous call time for real-time audio monitoring.
• Location Tracking Get the approximate location using BTS station triangulation by sending an SMS command.
• Audio Recording Function Save 10-minute recordings on an inserted microSD card manually or upon sound detection.
• Low Power Consumption Optimized energy use: 2–3 mA in standby, 20–30 mA during detection, and 100–150 mA in call mode.

Functions:

• Extended Knowles microphone for superior sound quality
• 20 days of stand-by
• 10 hours of continuous listening
• Call-back function
• Location tracking via BTS triangulation
• Audio recording to microSD upon sound detection

Ideal for: High-fidelity surveillance in remote or technically restricted locations where power access is limited. The 20PRO K+ is optimized for professionals requiring discreet yet acoustically accurate monitoring.

The LongLife series 20PRO K+ is intended for authorized use only, including property protection and lawful surveillance. Ensure compliance with all local legislation regarding covert audio recording.

The package contains:

• LongLife series 20PRO K+
• Charging adaptor
• Charging cable
• Extended microphone cable