Hidden recording device in the form of a USB flash drive

Hidden recording device in the form of a USB flash drive. The device is lightweight and small, made of aluminum and plastic. Memory capacity: 8 GB. 8 GB = 150 hours of recording in memory. Automatic save, recordings are saved immediately. It records without making a sound. Charging time: 1.5 hours. It records for a continuous duration of 14-15 hours. Digital recordings in WAV format. Approximate recording distance: 25 meters. Rechargeable lithium-ion battery.