1. Features
Small size, easy to carry.
Compatible with the line control feature of iPhone.
Use earphone to record the call, need no software, voice recorder or jailbreak.
Able to listen to songs, answer calls, record.
Can be used as a voice recorder.
Easy to use, just press button to record.
Voice prompt when start to record or recording ends.
Can play the recording, save the recording into the phone.
Copy the recording files out from the earphone connected to computer via USB cable.
Good sound quality, stereo clear bass playback.
Built in 512MB memory, recording duration up to 16 hours.
Built in 200MA lithium battery, continuous recording up to 5 hours.
1 year extra-long standby time.

2. Parameters
Working voltage: 5V
Recording current: ≤40mA
Playing current: ≤50mA
Sleep current: ≤10uA(theoretically standby time up to 1 year, but considering battery self discharge, so standby time is usually 3~6 months)
Charging current: ≤200mA
Speaker: 9 mm Dynamic type
Impedance: 32 ohms     
Sensitivity: 100dB±4dB    
Max power: 10 mW  
Frequency range: 20~20000Hz   
Cable length: 1.2M ±5%    
Cable: TPE, flat cable, 3.5*1.1mm
USB port: 3.5mm
Earphone shell: ABS plastic/ aluminum alloy
MIC sensitivity: -42dB omni response
Environment: indoor use, relative humidity less than 95%
Size: 60*19*12mm