Listening Device,GM5 Scientific Explorer Bionic Ear Electronic Listening Device Digital Device Nature Observing and Listening Device Hear conversations up to 300-feet away. Recommended for children 6-years of age and older. Please use the product on a spacious and broad places and dont use it a lot of appliances around. Noise reduction and a parabolic sound collecting dish for better hearing.Look through the targeting scope and then pull the trigger to amplify soun. Other features include on/off switch, 8x monocular, frequency controller, record button, playback button and FREE headphone.(No include SD card,only records for 12 seconds). Kindly note: The Headphone is a free gift