The Traveler TB-4P Bass is a 32" scale electric travel bass with a built-in 4-channel headphone amplifier. The proprietary In-Body tuning system uses standard tuning machines relocated into the body to create a guitar that has a full-scale neck, yet is substantially shorter than full-size basses. The lack of a headstock and a small, ergonomic body allow the guitar to be 22% shorter and 25% lighter than a full size bass, all while keeping your fingers happy with its 32" scale neck.

The active electronics include volume and tone controls, a standard 1/4" output for amps and effect units, a 1/8" AUX-in for jamming with your .MP3 player, and a 1/8" headphone output. You can practice privately with just the TB-4P and a pair of headphones. The built-in headphone amp features four channels to choose from. Cycle through clean, boost, overdrive and distortion tones using the custom tap-pot and listen through your headphones or favorite amp. A Duncan Designed MM-101 pickup delivers a full tone with plenty of low end. The TB-4P has an Eastern American hard maple neck. 
At just 6 pounds, 8 ounces and 35-1/4" long, the TB-4P fits in airline overhead compartments and is the most portable full-featured travel bass on the market. 

Excellent condition, no dings or dents and no play wear. Was $549 plus tax new! Comes with a deluxe gig bag. Features: Comfortable 32" scale
Built-in headphone amp with clean, boost, overdrive and distortion, plus AUX-in for jamming with your mobile device
Fits in overhead compartment
Overall depth: 2.63"
Overall length: 35.25"
Weight: 6.5 lb.
Deluxe gig bag included Specifications: Body
Body wood: Alder
Body thickness: 1.63"
Body width: 10.75"
Construction: Bolt-on
Finish: Sunburst or Pearl White gloss
Neck
Neck: Maple
Neck radius: 9.5"
Nut width: 1.75"
Fretboard: Maple (Sunburst) or pau ferro (Pearl White) Fretboard
Frets: 22 Jumbo 
Electronics
Audio output: Standard 1/4" jack, 1/8" headphone out
Pickup(s): Duncan Designed Mustang bass
Electronics: Active electronics
Controls: Volume, Tone
Headphone amp: V2 headphone amp with clean/boost/overdrive and distortion settings
Instrument input: 1/8" AUX in 
Other
Tuning Machines: Chrome 14:1 gear ratio (closed gear)
Pickguard: Tortoise shell
Scale length: 32"
Strings: D’addario EXL 165
Case: Gig bag