Features:NEVER MISS A DETAILED SOUND:Adopt advanced recording chip and sensitive microphone with fast recording speed with 26.24ft recording distancedisplays crisp and clear recorded voice. Audio formats support WAV.SMART BATTERY DETECTION:The recorder was built in smart battery detection which makes it save the recording automatically before power exhausted. Inbuilt 110mAh rechargeable battery provides up to 18Hrs continuous recording to meet your daily use. Note:Save the recording files before plug into the USB port.USER-FRIENDLY and WIDE APPLICATIONS:One key to start recording and savinghelp you catch the speakers point in lecturesmeetingsspeeches etc.. Note:Recording without LED light flash3S Red flash light then it begins to record when sound detected.DURABLE MATERILAS and PORTABLE:Adopt aluminum alloy and PC plastic materialsdurable and only weighs .028lbs. Easy to carry in your pocketpurse or suitcaseetc.. An optimal present for studentsprofessorsteachersbusiness peoplelawyerswritersbloggers etc..Note: on the device and only when sound detectscan the voice be recorded. Indicator:Recording without LED flash. Slide the button to the ON Sidethen red indicator light flashes for 3 secondsthen begin to record only when voice detected. Slide the button to OFF Side to stop/save the recording. the time of recorder with that of the computerthe newly recorded files will display accurate time same with that displayed on the computer. the machine shuts down due to low powerthe time will be reset. Please connect it to the computer to reset the time.:Save the recording files before plug into the USB port. the voltage is too lowthe indicator light will flash fast. Specifications:16G Parameters Memory Capacity: 16G Recording Time: 16G=192Hrs Recording Inbuilt Rechargeable Battery: 110mAh/3.7V Fully Charged Time: 1.5Hrs Materials: Aluminum Alloy Plastic Light Indicator: