Feature: 1. NOISE REDUCTION: Digital voice recorder with 360° directional microphone, clear recording of distant sounds, powerful DSP noise reduction chip, intelligent digital noise reduction, can automatically reduce ambient noise, clear recording playback of sound. 2. AUTO RECORDING: When this function is turned on, the recorder will automatically record when the surrounding sound reaches a certain decibel, and stop recording when there is no sound, which can save the storage space of the recording device. 3. 750MAH RECHARGEABLE BATTERY: The recorder is equipped with a 750mAh rechargeable battery that can record continuously for up to 150 hours after charging (about 2 hours). If the battery is low, the recorder can save the data automatically. 4. RECORD QUICKLY: Timer recording, monitor recording, delete recording, AB repeat, etc. Slide the button to start recording or save recording. You can record quickly after powering on the device (with headphones will be better). 5. SUPPORTS BIT RATE: Portable voice recorder supports bit rate of 3072kbps/1536kbps/512kbps.Suitable for a variety of scenarios, meetings, business negotiations, classroom notes, lectures and so on. Specification: Item Type: Digital Voice Recorder Material: Metal, Electronics Model: K2 Battery Type: Built in 750mAh Li Ion Battery (Ship with Inbuilt Battery). Package List: 1 x Voice Recorder (Ship with Inbuilt Battery)1 x Wired Earphone1 x Charging Cable1 x Instruction Manual