Record Audio Format:WAV     External Memory:No     With Speakers:Yes     Playback Formats:MP3,WAV     Model Number:SK007     Balanced Out:Yes     External Microphone:No     Dimensions(WxHxD):7.2*2*0.8cm     Built-in Li-ion battery:yes     Speaker:yes     Memory:No     Memory card/TF card:Not included     Name:Mini Digital Voice Recorder pen     Features:Compact mini     Support TF card expansion memory      Zinc alloy is high-grade and feels good      High-quality recording for continuous recording for more than 20 hours.     Have MP3 function      Actual maximum output:300mw     Battery:3.7V/200MA Class A lithium battery     TF card:up to 32GB(Not included)     Screen:1.2 inches(OLED Ultra HD)     Mini USB:Speed 2.0     Colour:Black      Material:zinc alloy     Package Contents:     1* recorder     1* USB cable     1* headphones     Only the above package content, other products are not included.     Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.