With a great intuitive design you′ll capture all the audio you want!This 4GB USB Sound Control Digital Voice Recorder with MP3/Tel Recorder Function CL-R30 Black is powerful and functional enough to facilitate your life. The digital voice recorder allows you to record detailed conversations even though the phone conversations conveniently rather than rely on your memory or handwriting to recall them. Boasting long playback time up to more than ten hours， it supports WAV format mainly. With built-in voice-activated recording， this unit only records when sound is present， so you won′t be stuck screening through hours of dead air. We offer a variety of voice recorders with different memory space and three general recording modes of LP/SP/HQ to meet the needs of most people.                                    Features            Digital Voice Recorder is in new conditionBuilt - in flash memorySupports music playing functionLong time voice recordingMass storage USB high speedFour recording modesBuilt - in rechargeable battery                                                            Specifications            Memory Capacity    4GB    <br>LCD Display    1.1"    <br>Working Time    Recording: 20 hours， broadcast: 13 hours (plug headphone to listen)    <br>Recording Format    MP3， WMA    <br>Frequency    20Hz - 20KHz    <br>USB Cable    PC interface USB 1.1 / USB2.O    <br>SNR    80db    <br>Operating Temperature    0℃~40℃    Color    Black    <br>Dimensions    1.37" x 0.47" x 3.14" (L x W x H)    <br>Weight    108g / 3.81oz    <br>                                                            Package Includes            1 x CL-R30 4GB Digital Voice Recorder Pen <br>1 x USB cable<br>1 x External microphone<br>1 x Earphone<br>1 x Recording cable<br>1 x TelePhone line