Detailed Product Description

Built-in Flash 512MBytes Memory (128MB / 256MB available) 
Recording format: MP3 (recording) , WMA / MP3 (playback) 
Voice Activation System: Yes
Repeat playback: Yes
Continuous playback: Yes
Playback Speed Control: Yes
Skip Playback: Yes
FF Skip / Reverse Skip: Yes
Erase function: all files / all folders / each voice folder (A, B, C, D)  / music folder (M) 
Folders: 5 folders
Files per folder: 99 messages
Microphone sensitivity: High / Low
Speaker: Built-in 20mm round dynamic speaker 300mW
Earphone jack: 3. 5 pie / 16Ohm
Microphone jack: 6. 3mm
USB power supply: Yes (recording / playback using USB) 
Power Supply: 2 x 1. 5 V / AAA battery
Battery life: Recording: approx. 16 Hours, Playback: approx. 20 Hours
Dimension (WxHxD) : 30 x 100 x 16. 9
Weight: 34g
Memory: built-in 512MB
SLP: 582 h 30 min
LP: 364 h 6 min
SP: 64 h 42 min
HQ: 24 h 18 min
Super HQ: 18 h 12 min
Line-in encoding feature: Yes
Support telephone adapter: Optional
Beep sound: Yes
Divide message: Yes (30 / 60min) 
Split message in specific position: Yes
Format memory: Yes
Upgradeable firmware (feature) : Yes
Playback intro feature: Yes
Display remaining time: Yes