The OMNITRONIC Charger for HM-105 is an external switch-mode mains adapter designed for charging the rechargeable battery in the HM-105 handheld microphone, a component of the W.A.M.S.-05 PA system. It accepts 100–240 V AC at 50/60 Hz and provides a 5 V DC, 2 A output. The specified battery recharging time is 4 hours. The charger measures 8 cm wide, 2.5 cm deep and 7.5 cm high, and weighs 0.11 kg.