Replacement Charger Cable for VoiceBooster & Aker Voice Amplifiers VoiceBooster/Aker Charger for VoiceBooster/Aker Voice Amplifiers. Works with all VoiceBooster/Aker models. Works on 110volts - 240volts The VoiceBooster brand is owned by TK Products, LLC. Each VoiceBooster product comes with a 6 month parts and Labor Warranty that is serviced by TK Products, LLC. The VoiceBooster must be purchased through TK Products or one it's authorized dealers for Warranty Claims to be honored. Buy with confidence!