Full data are available at
http://www.robot-electronics.co.uk/htm/Sp03doc.shtml but here  are the short
specs:

 Devantech SP03 - Text to Speech Synthesizer

 Voltage - 5v only required
 Current - 35mA Standby, 60-100mA Speaking.
 Synthesizer - Winbond WTS701EM/T
 Control 1 - RS232 interface to PC (38400 baud)
 Control 2 - I2C interface for easy wiring to Micro-controller.
 Control 3 - 5 pin parallel input port.
 Stored Speech - 30 phrases with up to 1925 total characters.
 Text to Speech - Unlimited via RS232 or I2C interfaces.
 Speaker - 40mm Speaker built in.
 Amplifier - 325mW LM386 on-board.
 Small Size - 40mm x 40mm excluding connectors.

The SP03 uses recorded human voice segements so it sounds more natural than
most speech engines.  One can choose male or female voice and it has
adjustable volume, pitch and speed.

 Note that you can record 30 canned text messages, with up to 1,925
characters AND have unlimited Text To Speech ( T T S ).

 You may download or play samples of the audio output of this device
directly at the following URLs:
http://www.robot-electronics.co.uk/files/s1.wav
 http://www.robot-electronics.co.uk/files/s2.wav
 http://www.robot-electronics.co.uk/files/s3.wav
 http://www.robot-electronics.co.uk/files/s4.wav
 http://www.robot-electronics.co.uk/files/s5.wav
 http://www.robot-electronics.co.uk/files/s6.wav

 The samples are meant to be comedic to some extent as the website deals
with amateur robotics.


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