- 78 - © 2018 unitech Electronics Co., Ltd. All rights reserved.unitech is a registered trademark of unitech Electronics Co., Ltd.MS652 User’s Manual3.11.2 Matrix 2 of 5 Check DigitThe check digit is the last character of the symbol used to verify theintegrity of the data. Scan one of the following bar codes to determinewhether to include the Matrix 2 of 5 check digit with the bar code data.Matrix 2 of 5 - One Discrete Length*(Default: 14)Matrix 2 of 5 - Two Discrete LengthsMatrix 2 of 5 - Length Within RangeMatrix 2 of 5 - Any LengthEnable Matrix 2 of 5 Check DigitDisable Matrix 2 of 5 Check Digit*