Note: Please allow some error due to manual measurement. Specification: Item Type: MP3 Player_x000D_Material: Metal, Electronic_x000D_Model: X2_x000D_Battery Type: Built in 300mAh lithium battery (included)_x000D_Size: Approx. 4.5 x 1.8 x 0.5cm / 1.8 x 0.7 x 0.2in Features: 1LARGE MEMORY CAPACITY: Voice recorder MP3 player has a large memory capacity, enough for over 24 hours of continuous recording and up to 750 hours of file storage. The mini size also makes it a convenient MP3 player and USB drive when needed. 2CLEAR SOUND: Voice activated recorder utilizes intelligent dynamic microphones and triple noise reduction technology to ensure noise free recordings and 360 degree panoramic recordings that deliver crystal clear sound. You can enjoy the recording and playback process with ease. 3EASY RECORDING AND NAMING: With a simple toggle switch, it can start recording after about 5 seconds and save the recording by switching the switch to "off and save". Each recording is named with a time stamp, making it easy to find the file on your computer. 4VOICE ACTIVATION FUNCTION: To minimize gaps and whispers in your recordings, conserve battery life and free up memory space, simply follow the instructions to activate the voice activation feature. You can adjust this feature at seven sensitivity levels. 5APPLICABLE SCENARIOS: Voice recorder music player is perfect for lectures, conferences, interviews and more. It makes a wonderful present for teachers, students, writers and anyone who needs a reliable voice recorder. PackageList: 1 x MP3 Player 1 x Wired Headphones 1 x Charging Cable 1 x User Manual