Electronic listening device
1. Equipped with eightfold specially-made focusing monocular with high-definition
2. After focusing monocular to lock up the target, able to tune in voices within 100-200m with the professional earphone provided
3. Able to shield the voices outside target through frequency adjustor
4. With 12 seconds and 30 seconds record and playback functions 5. Able to output the record to recorder or MP3 or other recording facilities