Material: zinc alloy metal Internal memory: 4GB/8GB/16GB Two stereo microphones inside One-key record, stop and playback LCD: OLED display multi-languages Speaker spec:8Ω,1W High quality recording up to 1536kbps Music format: MP3, WMA,WAV FM tuner and FM record Record format: WAV and MP3 reference recording time for 8GB: PCM(1536kbps)---12hours Noise Cancellation(384kps)---48hours HQ(128kbps)----136hours LQ(8kbps)----2228hours Power supply: 320mah rechargeable Lithium battery Recording time for full recharged: PCM--12hours, Noise cancellation--17hours HQ--28hours Dimension: 97*23*10.5 mm Weight: about 28g Accessories: Earphone, USB cable