diff --git a/README.md b/README.md
index fc4dbbb..19038fa 100644
--- a/README.md
+++ b/README.md
@@ -1,13 +1,15 @@
 # USB Power Tester based on ATtiny45/85
-Simple USB Power Tester based on ATtiny45/85 and INA 219. You can switch between different screens by pressing the SET button.
+Simple USB Power Tester based on ATtiny45/85 and INA219. You can switch between different screens by pressing the SET button.
 
 |Parameter|Value|
 |-|-|
 |Voltage|3V - 12V|
 |Current|max 5A|
-|Precision|4mV / 1mA|
+|Resolution|4mV / 1mA|
 
 ![IMG_20200528_172038_x.jpg](https://image.easyeda.com/pullimage/4j7P3MET7HhN669FMKdTfiZ1XwqVarHYLU3UOEZv.jpeg)
 ![IMG_20200528_172119_x.jpg](https://image.easyeda.com/pullimage/LORMqUaLmmN483w0B8SMBrNtKXEOCVjlLunBzuNg.jpeg)
 ![IMG_20200528_172221_x.jpg](https://image.easyeda.com/pullimage/dZ775PpXM0R2nRWyUrkCIs53FVuBVIK6hRWURprz.jpeg)
 ![IMG_20200528_172239_x.jpg](https://image.easyeda.com/pullimage/moE1NVdTYPggxly5Qm69yMyY5wfAJkTwBuSVVanD.jpeg)
+![IMG_20200809_110421_x.jpg](https://image.easyeda.com/pullimage/ljzX1HyNLBwO1GvyoRBCQjaGlI3ycSk1FJ5oKsjH.jpeg)
+![IMG_20200809_110600_x.jpg](https://image.easyeda.com/pullimage/PXM2S4wXi5KYAfG4INnevNDf3QakvV5zXRmoI4AY.jpeg)
diff --git a/hardware/USB_Tester_case_3dprint.zip b/hardware/USB_Tester_case_3dprint.zip
new file mode 100644
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Binary files /dev/null and b/hardware/USB_Tester_case_3dprint.zip differ