American Audio Pro Scratch 2 DJ CD Player Digital Manipulation, serial number: #1845105 #1845106, february 2004, made in Taiwan

Equipped with the PowerTouch Wheel, a touch-sensitive interactive jog wheel, it's programmed with Digital Scratching 2.0 for precise scratch control. 2 scratch modes: digital scratch and beat juggle. 9 onboard effects give you scratch, filter, echo, trans, skid, phase, flanger, pan, and bop with 4 presets to tweak them. Other cool features include tempo lock, security lockout mode, ratio and time parameter adjustment knobs, pitch bend (?4/8/16%), 3 flash start sampler buttons (7-second sample per button), flash cue, anti-shock memory, instant start, seamless loop, Fader Q start, reverse play, and more.

Features:
PowerTouch Wheel, a touch-sensitive interactive jog wheel
Digital Scratching 2.0 for precise scratch control
2 scratch modes: digital scratch and beat juggle mode
9 onboard effects give you scratch, filter, echo, trans, skid, phase, flanger, pan, and bop
4 preset parameters let you tweak each effect
Tempo lock
Lockout mode (for security)
Parameter ratio adjustment knob
Parameter time adjustment knob
Pitch bend (4, 8, and 16%)
3 flash start sampler buttons (7-second sample per button)
Flash cue
Anti-shock memory
Instant start
Seamless loop
Fader Q start
Reverse play
Volume control between music and sampler
Mixer between music and sample (can adjust pitches separately
FX mix on the fly
Auto cue function (-48dB)
3 sampler cues can be memorized
Selectable elapsed, remain, and total remain time display
Single/continuous play
Flip flop (relay playback between two decks)
Headphone output with volume control

Reference Manual

serial number:  #1845105, #1845106