diff --git a/pages/index.html b/pages/index.html
index 76dea5b..242f9ce 100644
--- a/pages/index.html
+++ b/pages/index.html
@@ -162,8 +162,7 @@ <h3>Sniffer</h3>
                     <th>Slave address</th>
                     <th>Function</th>
                     <th>Data length</th>
-                    <th>From master to slave</th>
-                    <th>From slave to master</th>
+                    <th>Data</th>
                 </tr>
             </thead>
             <tbody></tbody>
diff --git a/src/data-field.ts b/src/data-field.ts
index 7f8d5fd..4342a0e 100644
--- a/src/data-field.ts
+++ b/src/data-field.ts
@@ -21,13 +21,13 @@ class AddressQuantity {
 
 class Booleans {
     static readonly bitsInByte: number[] = [0x80, 0x40, 0x20, 0x10, 0x08, 0x04, 0x02, 0x01];
-    readonly onOff: boolean[];
+    readonly booleans: boolean[];
 
     constructor(data: number[]) {
         if (data[0] !== data.length - 1) {
             throw new Error(`Invalid data format for Booleans!`);
         }
-        this.onOff = data.slice(1).flatMap((byte) => Booleans.bitsInByte.map((bit) => !!(bit & byte)));
+        this.booleans = data.slice(1).flatMap((byte) => Booleans.bitsInByte.map((bit) => !!(bit & byte)));
     }
 }
 
diff --git a/src/dom.ts b/src/dom.ts
index a2767be..6c1c009 100644
--- a/src/dom.ts
+++ b/src/dom.ts
@@ -62,13 +62,21 @@ export const insertFrameRow = (frame: Frame, className: '' | 'send' = ''): void
         `${frame.functionCode} ${getFunctionCodeDescription(frame.functionCode)}`,
         `${frame.data.length}`,
     ].map((it) => new TableDataColumn(it, className));
-    if (frame.isNoValidDataFormat()) {
-        [frame.fromMasterToSlaveError, frame.fromSlaveToMasterError]
-            .forEach((it) => columns.push(new TableDataColumn(`${it} ${getBytesAsHex(frame.data)}`, 'error')));
+
+    if (frame.isUnknownFrame()) {
+        columns.push(new TableDataColumn(`Unknown frame: ${getBytesAsHex(frame.data)}`, 'error'));
+    } else if (frame.isNoValidDataFormat()) {
+        columns.push(new TableDataColumn(`This frame format does not fit to the function: 
+            fromMasterToSlaveError=${frame.fromMasterToSlaveError} 
+            fromSlaveToMasterError=${frame.fromSlaveToMasterError}
+            , for: ${getBytesAsHex(frame.data)}`, 'error'));
     } else {
-        [frame.fromMasterToSlave, frame.fromSlaveToMaster]
-            .forEach((it) => columns.push(new TableDataColumn(JSON.stringify(it, undefined, 2))));
+        columns.push(new TableDataColumn(
+            JSON.stringify(frame.fromMasterToSlave) +
+            JSON.stringify(frame.fromSlaveToMaster)
+        ));
     }
+
     insertSniffedRow(columns);
 };
 export const insertErrorRow = (errorMessage: string): void => {
@@ -77,7 +85,6 @@ export const insertErrorRow = (errorMessage: string): void => {
         ``,
         ``,
         ``,
-        ``,
         errorMessage,
     ].map((it) => new TableDataColumn(it, 'error')));
 };
diff --git a/src/frame.ts b/src/frame.ts
index af045cf..884b658 100644
--- a/src/frame.ts
+++ b/src/frame.ts
@@ -30,6 +30,10 @@ export class Frame {
         return !!this.fromMasterToSlaveError && !!this.fromSlaveToMasterError;
     }
 
+    isUnknownFrame(): boolean {
+        return !this.isNoValidDataFormat() && !this.fromMasterToSlave && !this.fromSlaveToMaster;
+    }
+
     protected getError(e: any): string {
         return `${e.message}`;
     }
diff --git a/src/main.ts b/src/main.ts
index 659b292..6c9682c 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -94,7 +94,6 @@ document.querySelector('form[name=send]')!.addEventListener('submit', event => {
         bytes.push(parseInt(data.substring(i, i + 2), 16));
     }
     const frameBytes = new Uint8Array([formData.slaveAddress, formData.functionCode, ...bytes]);
-    console.log(formData, frameBytes);
     insertFrameRow(new Frame(Array.from(frameBytes)), 'send');
 });