Features - Color: Black - Material: Plastic - Size: 9.15x3.4x1.3cm - High volume speaker, supports multiple music formats - Built-in large LCD display screen, allows you to see device status clearly, convenient for operation - Suitable for meetings, lectures, conversations, classroom, presentations, student learning and other occasions Specification - CPU model: ATJ2127 - CPU frequency: 24KHZ - Music playback formats: MP3, WMA, OGG, APE, FLAC, WAV, aac-lc, ACELP - WAV format (512kbps-1536kbps), MP3 format (64kbps-192kbps) sampling frequency - Headphone jack: 3.5mm stereo port - Maximum output of headset: (L) 9mW + (R) 9mW (32Ohm) - USB interface: 3.5mm interface / DC5V-1000mAh (specific to this device) - Screen: 0.8 inch LED, resolution 128*64 - Built-in MIC: non-directional capacitor MIC - Recording current: 8mA-13mA - Frequency response: 24Hz - Distortion: 90dB - Signal-to-noise ratio: 0.06% - Built-in speakers: Dynamic 2510mm, 8ohm - Built-in speaker output: 800mW - Storage: embedded flash (4GB-32GB optional), external TF card support 4GB-128GB - Operating temperature: -10°C to 40°C - Body weight: 44.6g (without packaging) - Dimensions: 91.5mm x 34mm x 13mm - Power supply: lithium battery / 3.2-4.2V - Battery: lithium ion (LiCoO2): 200mAh - Battery life: approximately 20 hours recording, approximately 10 hours playback (with headphones) - Supported systems: Windows XP, Vista, 2000, ME, 98 (drivers required), Mac OS 10