Digital Voice Recorder MP3 Player Noise Reduction 4552 Hours Voice Activated Recording Device Sound Recorder with Playback for Windows 16GB Item Type: Digital Voice Recorder Material: Plastic + Aluminum Alloy Performance: Adopting Torsion 2155 lossless digital decoding application solution Screen: LCD Display Recording Format and Sampling Rate: WMA (32Kbps-1536Kbps) Recording Quality: WAV 512Kbps (Default) Music Playback Formats: Various Supported Frequency: 24KHz Recording Power: 12mA-26mA Features: Recording, Voice Activated Recording, Clock, Scheduled Recording, Voice and Music Playback, Repeat, Password Guard, Low Power Auto Shutdown Maximum Output: (L) 9mW + (R) 9mW (32Ohm) External Input: Headphone 3.5mm Jack, Mic 3.5mm Jack USB: PC Interface USB1.1, USB2.0 Full Speed Built in Speaker Output: 800mW Built in Speaker: Dynamic 8ohm, 1W 20mmx30mm Built in MIC: Omnidirectional Capacitor MIC S/N Ratio: 90dB Battery Capacity: 500mah Lithium Battery (Included) Storage: External Memory Card, Included Memory Card Operating Temperature: -10°C to 50°C Battery Life: About 48 Hours Recording (512Kbps), 25 Hours Playback (Using Earphones)