Digital Audio Recorder - Universal - 8GB USB Remote Digital Sound Recorder with Key to Record Noise Reduction MP3 Audio Recorders 128Kbps MP3 Player | Highlights Universal 8GB USB Remote Digital Sound Recorder with Dongle for Recording Noise Reduction MP3 Audio Recorders 128Kbps MP3 Player | 8GB USB Remote Digital Voice Recorder 1 Key Audio Recording MP3 Recorder Noise Reduction Voice MP3 WAV Recording Player 128Kbps | Digital voice recorder Specification: Built-in lithium battery (270MA) Memory capacity support: 8g Capacity (memory card) Recording time: 8G maximum recording 144 hours Fully charged battery recording time: about 10 hours Recording time recording: MP3 format Recording sampling Bit rate: 128Kbps Recording current (approx.): bright screen: approx. 33mA: off-screen: approx. 26mA On current / standby current (approx.): bright backlight: 33mA; 26mA Shutdown Shutdown Current: 27 microamps Actual Maximum Output: (L)10MW + (R)10MW (32OHM) Frequency Response: 20Hz to 20kHz External Input: 3.5mm Headphone Jack, USB Micro-Covered: non-directional condenser microphone S / N (noise ratio): 70 dB Current source; Rated voltage: .3.7v-4.2v USB input Voltage/power: 5V300MAH - 5V500MAH Distortion: 0.05% Machine accessories: Clear book, data cable, earphone Battery life (all full charge) Recording: about 10 hours of external sound (about 30mA depending on sound size); Headphones: about 30 hours (9m2) Music: about 5 hours of external sound (depending on the size of the song); Earphones: about 20 hours (13ma) Screen size: 28*25 Broken code screen Machine size: 88mm*33mm*12.5mm Support system: Windows98/2000/XP etc.