What is in the box: 

• 1 x Joyo Multi-Effects Processor GEM Box
• 1 x Joyo Multi-Effects user manual
• 1 x Joyo Multi-Effects 9V DC adapter Power Supply 
• 1 x Top and High quality mono cable 
• 1 x Guitar Pick (Random Color)

Product Name : Joyo Multi-Effects Processor GEM Box Effect Pedal 

Specifications :

• Multi-effects unit with assignable expression pedal
• Both a drum machine and processor for ultimate practice tool
• Amp simulators and 15 digital algorithms for distortion
• CD quality sound (48kHz sample rate and 16-bit conversion)
• Useful Reverb, Delay, Compressor, Wah, and Musical EQ
• 

JOYO GEM Box Multi-Effects Processor JOYO GEM Box

The JOYO GEM Box is the perfect late night or bedroom practice tool, you can have complete control of your tone and have it all at whisper level volumes or entirely through a set of headphones. Wether you just want to jam along with a set of drums or you need to practice that scorching hot lead late at night, the GEM Box is perfect.

JOYO multi-effects processor unit with assignable expression pedal. Both a drum machine and processor for the ultimate practice tool. Get any sound you want and save it so you can use it whenever you want. Fully adjustable effects parameters and eq controls. 

GEM Box Guitar Multi-Effects Processor By JOYO A great multi effects pedal from JOYO which includes a built in drum machine with 40 different rhythms with fully variable tempo from 60~270 beats per minute. Built in electronic tuner operated by the foot switches. An expression pedal which can control the modulation, drive, delay and gain. Built in effects patches or build and save your own unique sounds. Eight effects modules giving 60 types of effects including Chorus, Flanger, Phaser, Tremolo, Vibrato, Distortion, Fuzz and much more.

• 8 Effect Modules.
• 60 Effect Types.
• 40 Preset Patches.
• 40 User Patches.
• 40 Drum Rhythms.
• Assignable Expression Pedal.
• Precise Tuning Function.
• Patch Pre-Select Recall Function.
• Compact Operation Interface.
• Lightweight & tiny for easy transportation.
• 9v DC Power Supply (included).
• AA Battery x4 Power Supply.
• Sampling Frequency: 48 kHz
• A/D converter: 16 bit, 384 times over sampling
• D/A converter: 16 bit, 384 times over sampling
• Dimensions: 158 mm (D) x 237mm (W) x 63 mm (H)
• Weight: 730 g (without batteries)