M139 can be inserted in the host computer Apple 4, on the car drink holder, relatively nice.

By headphone jack, you can connect the phone to play other than Apple

While to charge two electronic products

Memory capacity: 128MB
Power Source: Cigarette lighter power supply
Source Category: independent audio interfaces formula
Screen size: 1.1 inches
Audio playback formats: MP3 Video Player
Format: does not support video
Memory Card Type: Does not support expansion cards
Player Category: Car MP3
SNR: 85dBA
Transmission Distance: 5m and below