Built-in lithium battery (270MA)Memory capacity support: 4G\/8G\/16G\/32G (TF Card is not included)Capacity (memory card) recording time: 4G maximum recording 72 hours, 8G maximum recording 144 hours, 16G maximum recording 288 hours, 32G maximum recording 576 hoursFully charged battery recording time: about 10 hoursRecording format: MP3 formatRecording sampling bit rate: 128KbpsRecording current (approximately): bright screen: about 33 mA: off screen: about 26 mAPower on\/standby current (approximately): bright backlight: 33 mA; off backlight: 26 mA shutdown current: 27 microampsActual maximum output: (L) 10mW(R) 10mW (32Ohm)Frequency response: 20Hz to 20KHzExternal input: 3.5mm headphone jack, USBBuilt-in MIC: non-directional capacitor microphoneS\/N (Noise Ratio): 70dBPower supply; rated voltage: .3.7V-4.2VUSB input rated voltage\/power: 5V300MAH--5V500MAHDistortion: 0.05%Machine accessories: clear book, data cable, earphone;Battery life (every full charge) Playback Recording: about 10 hours of external sound (about 30MA depending on the volume of the sound); earphones: about 30 hours (9MA)Play 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 screenMachine size: 88mm*33mm*12.5mmSupport system Windows98\/2000\/XP, etc.Used ABS raw material production and appearance matte process productionBuilt-in high-end professional recording audio processing program.MP3 format professional recording, one-key recording.Large-capacity memory, allowing you to easily record.Condenser microphone recording, reproduce the original recording.Intelligent noise reduction, which can effectively filter the noise part of the sound source.Large-capacity polymer battery to meet your recording time needs.Using high-definition broken code screen display, easy to operate at night, clearly visible.Support multiple formats MP3 WAV audio file playback.The recording function is automatically shut down and saved under low power, so that files will not be lost.lDrive-free U disk function, USB2.0 universal interface, high-speed data transmission.Intelligent voice-activated recording, effectively saving storage space and reducing blank useless files. Support recording function, convenient and practical One button has one function, easy to operate