This recording device s an HD recording mode to ensure that you capture high-quality audio with clarity. The recording format is WAV, which is widely used for audio recording and ensures compatibility with most devices. The device also supports a recording time of up to 1000 minutes. The maximum number of recording files is 888, providing ample storage space for your recordings. However, the device does not support expansion cards, so you'll need to manage files within this limit. There is no display screen on the device, which helps to keep it compact and easy to use. The transmission interface is USB 2.0, allowing for easy file transfer to other devices. The device s a two-way microphone, allowing you to capture audio from different angles. It has a recording distance of 5-10 meters, making it ideal for capturing audio in larger rooms or spaces. The device does not support video capture. The device has a lithium battery, offering a long-lasting power source for extended use. The shell material is made of CNC aluminum alloy, making it durable and resistant to wear and tear. The product size is 65x22x9 (mm) and weighs only 17g, making it compact and portable. The device is suitable for a wide range of people, including business people, public prosecutors, journalists, and students, as well as security personnel and family caregivers. The device is also suitable for use as a gift, such as for business negotiations, public security work, interviews, meeting minutes, or corporate training. It can also be used for language learning, music listening, and family care. It can be given as a gift for festivals, housewarming parties, trade fairs, or advertising purposes.