Easy to solder, but needs a little patience. NOTE: If you wander is there any setup, here it is: 1) Don't plug it in right away. First press and hold button and then connect USB cable. You should see all LEDs light up at once. After few seconds it will light different rows and eventually it will display EN for English and later on there will be sign for Chinese. Whichever language you want you should release button at EN if you want English for example. 2) When it is already plugged in: Press and hod button. It will display (if EN is selected in step 1) following: "A 1" If you press button once again, it will display "A 2". If you select "A 1" it will process audio signal as if Mono audio signal. If you select "A 2" it will divide columns in 2 parts and on left part it will process L audio channel and on right side it will process R audio channel.

Easy to solder, but needs a little patience. NOTE: If you wander is there any setup, here it is: 1) Don't plug it in right away. First press and hold button and then connect USB cable. You should see all LEDs light up at once. After few seconds it will light different rows and eventually it will display EN for English and later on there will be sign for Chinese. Whichever language you want you should release button at EN if you want English for example. 2) When it is already plugged in: Press and hod button. It will display (if EN is selected in step 1) following: "A 1" If you press button once again, it will display "A 2". If you select "A 1" it will process audio signal as if Mono audio signal. If you select "A 2" it will divide columns in 2 parts and on left part it will process L audio channel and on right side it will process R audio channel.

Easy to solder, but needs a little patience. NOTE: If you wander is there any setup, here it is: 1) Don't plug it in right away. First press and hold button and then connect USB cable. You should see all LEDs light up at once. After few seconds it will light different rows and eventually it will display EN for English and later on there will be sign for Chinese. Whichever language you want you should release button at EN if you want English for example. 2) When it is already plugged in: Press and hod button. It will display (if EN is selected in step 1) following: "A 1" If you press button once again, it will display "A 2". If you select "A 1" it will process audio signal as if Mono audio signal. If you select "A 2" it will divide columns in 2 parts and on left part it will process L audio channel and on right side it will process R audio channel.

Bought for entertainment and to practice SMD soldering. Went together fine and worked first time. Had a bit of difficulty soldering the micro-usb connector. The options are: A 1 mono 2 stereo (split screen) B 1 use left channel 2 use right C 1 slow update -- 4 fast D 1 most sensitive -- 3 least sensitive E 1 dim 2 bright F 1 or 2 - different display modes Draws 15 ma idle, about 80 ma fully illuminated. I left the audio amp and speaker unsoldered since I did not want it making sound.

Bought for entertainment and to practice SMD soldering. Went together fine and worked first time. Had a bit of difficulty soldering the micro-usb connector. The options are: A 1 mono 2 stereo (split screen) B 1 use left channel 2 use right C 1 slow update -- 4 fast D 1 most sensitive -- 3 least sensitive E 1 dim 2 bright F 1 or 2 - different display modes Draws 15 ma idle, about 80 ma fully illuminated. I left the audio amp and speaker unsoldered since I did not want it making sound.

Bought for entertainment and to practice SMD soldering. Went together fine and worked first time. Had a bit of difficulty soldering the micro-usb connector. The options are: A 1 mono 2 stereo (split screen) B 1 use left channel 2 use right C 1 slow update -- 4 fast D 1 most sensitive -- 3 least sensitive E 1 dim 2 bright F 1 or 2 - different display modes Draws 15 ma idle, about 80 ma fully illuminated. I left the audio amp and speaker unsoldered since I did not want it making sound.