What's in the box:

Mooer Comp Micro Mini Optical Compressor Effect Pedal for Electric Guitar True Bypass

Features:
Classic optical compressing sound with smooth attack and decay, preserves the original signal transients perfectly.
True bypass design.
Mini and exquisite appearance.
Aluminum alloy housing.
Comp, EQ, Volume control knobs:
Comp: Adjust the intensity of compression;
EQ: Adjust tone of sound;
Volume: Adjust the output volume.

Specifications:
Color: Yellow
Suitable for: Electric guitar
Material: Aluminium alloy & PCB
Input: 1/4" monaural jack (impedance: 470k Ohms)
Output: 1/4" monaural jack (impedance: 1k Ohms)
Power requirements: AC adapter 9V DC
Current draw: 10mA
Item size: 9 * 3.5 * 3.2 cm / 3.5 * 1.4 * 1.3in
Item weight: 146g / 5.2oz
Package size: 10.5 * 6 * 4.6cm / 4.1 * 2.4 * 1.8in
Package weight: 169g / 6oz

Package List:
1 * Optical Compressor Pedal
1 * User Manual (English & Chinese)