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diff --git a/source/use_case/kws_asr/include/Wav2LetterModel.hpp b/source/use_case/kws_asr/include/Wav2LetterModel.hpp
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+/*
+ * Copyright (c) 2021 Arm Limited. All rights reserved.
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#ifndef KWS_ASR_WAV2LETTER_MODEL_HPP
+#define KWS_ASR_WAV2LETTER_MODEL_HPP
+
+#include "Model.hpp"
+
+namespace arm {
+namespace app {
+namespace asr {
+    extern const int g_FrameLength;
+    extern const int g_FrameStride;
+    extern const float g_ScoreThreshold;
+    extern const int g_ctxLen;
+} /* namespace asr */
+} /* namespace app */
+} /* namespace arm */
+
+namespace arm {
+namespace app {
+
+    class Wav2LetterModel : public Model {
+        	
+    public:
+        /* Indices for the expected model - based on input and output tensor shapes */
+        static constexpr uint32_t ms_inputRowsIdx = 1;
+        static constexpr uint32_t ms_inputColsIdx = 2;
+        static constexpr uint32_t ms_outputRowsIdx = 2;
+        static constexpr uint32_t ms_outputColsIdx = 3;
+
+    protected:
+        /** @brief   Gets the reference to op resolver interface class. */
+        const tflite::MicroOpResolver& GetOpResolver() override;
+
+        /** @brief   Adds operations to the op resolver instance. */
+        bool EnlistOperations() override;
+
+        const uint8_t* ModelPointer() override;
+
+        size_t ModelSize() override;
+
+    private:
+        /* Maximum number of individual operations that can be enlisted. */
+        static constexpr int _ms_maxOpCnt = 5;
+
+        /* A mutable op resolver instance. */
+        tflite::MicroMutableOpResolver<_ms_maxOpCnt> _m_opResolver;
+    };
+
+} /* namespace app */
+} /* namespace arm */
+
+#endif /* KWS_ASR_WAV2LETTER_MODEL_HPP */