Name: Recording pen Screen material: IPS color screen Recording format: MP3, WAV Recording quality: 1536KBPS Sampling rate: 44KHZ Microphone: dual microphone Speakers: supported Recording mode: voice control/one button recording Working time: 24 hours of continuous recording. Standby time: 90 days Built in battery: 230 mah Charging time: 2 hours Charging interface: Micro USB Headphone interface: 3.5mm Memory expansion: up to 128GB TF card (not included) Product size: 11 * 26 * 98mm/1.02in * 0.43in * 3.85in Product material: zinc alloy Note: 1. The recorder must have a TF card inserted before it can be used. Package Included: 1 * Recording pen 1 * User Manual 1 * Micro USB data 1 * TF Card(Optional)