Features: 100% brand new and high quality Audio Sampling Rate: 32KHZ. Expansion memory: large capacity TF card expansion, built-in cache, high-speed operation, support large capacity memory card expansion 64GB, can store audio, conference, learning materials. Ideal Gifts: Gifts for parents, friends, family, students, colleagues. Recording format: WAV. Storage Media: TF Memory Card Storage. Package Includes: 1PC Professional Recording Pen Specifications: Material: Metal Memory: 8G, 16G, 32G, 64G, 128G Product Dimension: approx. 14X1.7 cm/ 5.51x0.67 inches Net Weight: 85g/ 0.19 lbs Recording format: WAV Audio Sampling Rate: 32KHZ Recording Quality: MP3-128K Frequency: 20-20KHZ Storage Media: TF memory card storage Display: None Microphone: Omnidirectional high sensitivity condenser microphone Operating Temperature: -10-- 40 note: Please allow 1-2cm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item.