Record o 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) Sn: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.