DTMF is the abbreviation of Dual-Tone-Multi-Frequency ( also known as touch-tone ). They are the combination audible sounds you hear when you press keys on your telephone phone, cellular phone and the Tone Dialer . It is widely used in communication products such as telephone sets, cellular phone sets, walkie tailkie, so that it is ofter used in remote control purpose.

The DTMF Decoder ( Tone Decoder ) can read the DTMF signals and decode them at the LCD display. The user can read out  signals as  1, 2, 3, 4, 5, 6, 7, 8, 9, 0, or A, B, C, D.

The device is oftenly used to decode the dialing tone number which is recorded at the tape of telephone recorder.

• Can decode the DTMF signals accurately and display at the LCD screen.
• If the device is tapped at the telephone line, it can read out the dialing number.
• 3 decoded numbers can be stored.
• "BEEP" reminding sound at pressing function keys.
• 2 optional ways for audio input.
• steel extendible stand. 

• 3 memories.
• Slim with light weight, palm size. Can be put at pocket. 
• Powered either by 9V battery or from AC power ( through the AC/DC adaptor ).

• Helps prosecutors, policemen, investigators collect evidence for law enforcement purpose.

• Helps private detectives, personal users register or decode the outgoing call numbers.

• Laboratories use it as the tester to development new products.

• Retailers use it to test products.

• The user of telephone recorder.

ACCESSORIES

OPTIONAL ACCESSORIES