Features:
The JF-37 Chorus pedal uses an BBD chip to give you the chorus sound and accurate reproduction. 
Chorus can expand your musical horizon, when it comes to tones.
Rate and Depth knobs let you adjust chorus speed and depth.
True bypass design is used to minimise tone loss.
Simple design and a sturdy casing.

Specifications:
Model: JF-37
Color: Blue
Material: alloy
Input impedance: 1Mω
Output impedance: 1Kω
Running current: 12mA
: 6F22 9V / 9V (Neither included)
Item size: 11.7 * 6.7 * 5.1cm / 4.6 * 2.6 * 2.0in
Item weight: 200g / 7.0oz
Package size: 13 * 7.5 * 6.2cm / 5.1 * 2.9 * 2.4in
Package weight: 240g / 8.4oz

Package List: I287 
1 * Effect Pedal
1 * User Manual (English & Chinese)

Note: 
This unit is without , put on the by opening the back cover with a screwdriver.
Please use the 9V whose polarity is positive pole outside and negative pole inside. Otherwise, the product may not work properly.