General Specifications
Name/Model CP13 Hardware solution op amp: JRC5532
color Sky blue/Black and white/Red and silver Weight About 310g
Dimensions About 120x88.3x31.8mm
Volume control type
Volume knob
Jitter ≤ 0.2% Flywheel Φ30.4mm oversize pure copper flywheel
4.2V high voltage motor power supply
Custom movement 
Supported cassette types:
All Types (I to IV)
Magnetic head
Carefully selected thickened custom permalloy magnetic head
Adaptive impedance
Buttons and Ports
Buttons Physical buttons (Play*1+Rewind*1+Fast ward*1+Pause*1)
USB port
Type-C USB (charging port)
Headphone output Standard 3.5mm
Volume adjustment knob
Power Supply Parameters
Power Supply Supports DC 5V/≥2A
Battery capacity
1800mAh polymer battery
Charging time About 3H (5V 2A adapter)
Standby time
>268 days  
Battery life and test conditions  
3.5mm headphone out: ≥13 hours
Audio input Native cassette playback Gain N/A
Volume 40mV output charging switch
Loading 32 Ω    
Audio Parameters
Parts of performance and parameters of headphone output (3.5mm)
output amplitude L+R≥250mV+250mV (32Ω) THD+N & Noise ≤ 3.5%
Output power 1 L+R≥1.3mW+1.3mW (16Ω) SRN ≥55dB (A-weighted)
Output power 2 L+R≥2mW+2mW (32Ω) Noise floor <0.55mV (A-weighted)