What's in the box:

ammoon AP-05 Dynamic Compressor Guitar Effect Pedal True Bypass

Features:
A re-creation of the classic Ross compressor, with very low noise.
Use the Sustain, Attack, and Level knobs to find your ideal tone.
Sustain: To control the delaying time of compressing;
Attack: To control the starting time of compressing effect;
Level: To control the output level.
True bypass design minimizes tone loss.
Aluminum alloy casing with stove varnish finish.
LED indicates working and power statement.
Powered by a 6F22 9V battery or 9V DC power adapter (neither included).

Specifications:
Color: Green
Material: Aluminum alloy
Input impedance: 500K ohm
Output impedance: 10K ohm
Running current: 8mA
Power: 6F22 9V battery / DC 9V adapter (Neither included)
Effect pedal size: 11.8 * 6.4 * 3.8cm / 4.6 * 2.5 * 1.5in
Effect pedal weight: 302g / 10.7oz
Package size: 13 * 7.7 * 6cm / 5.1 * 3.0 * 2.4in
Package weight: 349g / 12.3oz

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

Note:
No battery or adapter is included.