Built-in stereo mic:
Unidirectional condenser, 90° XY stereo format
Gain: -∞ dB to +39 dB
Maximum sound pressure level: 120 dB SPL
Inputs:
1/8″ stereo phone jack
Rated input level: -∞ dB to -39 dBm
Input impedance: 2 kΩ
Plug-in power supported (2.5 V)
Built-in speaker:
Built-in 500 mW mono speaker
Output impedance: 8 Ω
Outputs:
1/8″ stereo phone jack (combined line/headphones)
Rated output level: 20 mW + 20 mW into 32Ω load
Output impedance: 10 kΩ or more
USB:
Micro USB port
Mass storage class operation: USB 2.0 high speed
Audio interface operation: 44.1/48kHz sampling rate, 16-bit depth, 2-in/2-out
Transfer method: asynchronous
Battery life (alkaline batteries):
Approximately 10 hours
(continuous recording time using built-in mic, 44.1 kHz/16-bit)
Dimensions:
1.9 in (W) x 5.4 in (D) x 1.2 in (H)
50 mm (W) × 137.5 mm (D) × 32 mm (H)
Weight:
0.13 lbs / 60 g (No batteries, 16GB SD card is Optional)
Note:
Battery will be taken out before shipping for logistic issue.
16GB SD card Boya BY-M1 mirophone optional!








K***a –
Cool thing, I have a rode microphone, but this is also a very useful device. Well done.