Have you used this solar charger? Does it work?

Last weekend, I watch an MP4 player solar charger online. Its function is so attractive. It can be used as either solar charger or MP4 player. It is amazing. Have you anyone used it? Have you known it? Here is the picture.

Other Features
• Solar/ USB/ DC 5V rechargeable
• USB Out for recharging devices with rechargeable batteries (Digital cameras, MP4 players, Mobile phones, etc)
• Selectable Voltage: 4.5V, 5V, 6.3V, 9V
• Built in high brightness LED flashlight
• FC/NES/GB/GBC emulator
• D-Pad + 4 button control
• Save game slots
• E-Book with reading capacity: will read out loud any TXT file in Chinese or English. Other Romance languages can be read, but the pronunciation will very often be incorrect
• MP3 Music can play while E-Book is being used
• Photo Zoom in + out / move right + left
• ID3 tag+Lyric display
• Color of machine: Black / red
Main Specification
• Memory: 2GB
• External Memory: SD Card (max 2GB)
• Video Format: AVI
• Conversion formats: MPG 1, 2, 4
• Video Resolution: 320x240
• FPS (Frames per Second): 25fps
• Music Format: MP3, WMA, AMR, WAV, ADPCM, PCM
• Bit rate: 32-320Kbps
• Picture Format: JPEG, BMP, GIF animation photos
• Built in MIC
• Record Format: WAV
• Earphone Jack: 2x 3.5mm
• SNR (Signal to Noise Ratio): 90dB
• Output of earphones: 2x 10mW (16Ohm)
• Output of speaker: 20mW
• Languages: English / Chinese (Please contact with our live chat if you need to get other language.)
• USB: 2.0
• System: Windows 98/SE/ME/2000/XP
• Power Source: Built in rechargeable Li-ion Battery
• User Manual, USB cable, Earphone, Power Adaptor, USB Charging cable, Six standard jack for cell phone,

We have a solar panel and it does charge as soon as daylight appears.
We have camped every other weekend through the winter and every weekend in the summer, with 2 months away as well on one holiday and 1 month on the second holiday.
We had hook up for about 5 days within this year which of coarse fully charged the battery but other than that we live off the solar panel.
A great invention in my view as we really live off free electric with it-Gizmograbber.com