Spy Gear

This Telephone voice changer 1 is a novelty item used for fun, to obtain a more realistic human sounding voice, you'll want to get the Voice Changer 2 - TVC-2 model.
Read the full item description here: Telephone Voice Changer

Now you can answer the telephone without anyone recognizing your voice. Press a button and completely change your voice. There are 8 different voice pitch changing settings. A man can sound like a stranger, a women can deepen her pitch to sound more like a man, or a grand-dad like a child. Unlike most voice changers, the Voice Changer 2 connects to your handset. Travels anywhere, measures just 5" x 3" x 1/2"! Voice Changer II operates on 3 AA batteries and includes handset connector cable.

Will not work on cordless phones or phones with dialing buttons on handset. (not compatible with all phone models) -
Read the full item description here: Telephone Voice Changer

Features:
- New Slim Compact design
- Built-in high quality microphone
- FSTN LCD, supporting multi-language display
- WAV encoding for better quality sound recording
- Voice-Operated Recording (VOR) and edit function
- A-B segment repeating
- 4 default folders / 800 files (200 files for 1 folder) recordable
- Recording via external microphone & recording for telephone
- Real clock to register recording time
- Built-in hi-fi amplifier and HQ speaker
- USB port to connect to PC

Read the full item description here: Phone/Room Recorders