8GB Digital Voice Recorder Voice Activated Audio Recording Noise Reduction with Playback MP3 Music Player 35hrs Recording Files Device Support Password for Lectures Meetings Class Interview Model: SU7 Memory TF card: 8GB, 16GB, 32GB, 64GB (Optional) Storage Capacity: 8GB  -  560Hr(322kbps) / 140Hr (128kbps) / 35Hr(512kbps) / 17.5Hr (1024kbps) / 11.5Hr (1536kbps) 16GB  - 1120Hr(322kbps) / 280Hr (128kbps) / 70Hr(512kbps) / 35Hr (1024kbps) / 23Hr (1536kbps) 32GB  - 2240Hr(322kbps) / 560Hr (128kbps) / 140Hr(512kbps) / 70Hr (1024kbps) / 46Hr (1536kbps) 64GB -  4480Hr(322kbps) / 1120Hr (128kbps) / 280Hr(512kbps) / 140Hr (1024kbps) / 92Hr (1536kbps) Maximum number of files:  999 files Recording format: WAV/MP3 Recording bit rate: 32kbps-1536kbps Recording sampling rate: 24KHz Record current : 10mA Actual maximum output:  (L) 9mW＋(R) 9mW (32Ohm) Microphone: 3.5pie Stereo jack Earphone: 3.5pie Stereo jack USB: PC Interface USB1.1/USB2.0 FULL Speed Display screen: 128*128 lattice 1.44 inch TFT multicolour Built-in speaker output: 800mW Built-in speakers: Dynamic 26mm,8ohm Built-in MIC: No directional capacitor Mac S/N: 90dB Polymer battery: 250mah, 3.6V USB input rated voltage / power: 5V300MAH-5V500MAH working temperature: -20℃～60℃ Weight: 42±1g   size: 86mm*22mm*10.5mm±1mm Battery life (Each full charge) recording 25～80hr; play back 2-8hr (Headphones to listen to)