BOSS
BOSS KTN-Mini Katana Portable Guitar Amplifier, A Compact, Go-Anywhere Amp That Runs On Batteries - Rich, Full Sound
BLACKSTAR
Blackstar FLY-3BASS Fly-3 Bass Portable Battery Powered Bass Amplifier
VALETON
Valeton Rushead Max USB Chargable Portable Pocket Guitar Bass Headphone Amp Carry-On Bedroom Plug-In Multi-Effects
VOX
The Vox AP2BS Amplug 2 - Bass Headphone Amplifier