Features:1. Digital recorder and music player with high quality sound.2. One-click recording, high efficiency in classes, interviews, meetings, lectures, etc.3. High-grade built-in microphone allows you to record detailed conversations.4. Memory support 8GB/ 16GB/ 32GB memory5. Small size, easy to carry and hide.Technical parameters:Color: BlackMaterial: MetalRecording format: WowMusic format: WavesPlayback format: wave, MP3Power supply: lithium-ion batteryBattery capacity: 3.7V 400mAhUSB port: USB 2.0Frequency response: 20 Hz - 20 kHzWorking temperature: 0~40°CWith speakers: YesBalance: YesCapacity: No capacity (support 8GB/ 16GB/ 32GB TF card)Compatible systems: Windows XP, Windows Vista, Windows 7, Windows 8Item Size: 7*1.8*1.1 cm/2.7*0.7*0.4 inchProduct weight: 34 g / 1.2 oz