Compact waistband 7W amplifier with adjustable waist strap and line output that comes supplied with a high-sensitivity electret headband microphone, ideal for general mobile speech applications, e.g. lectures and training sessions, sporting events, sales events. It also provides an additional line input (3.5mm jack) for external audio sources, e.g. MP3 player. It can be powered by standard or rechargeable batteries (not supplied) – charging of the optional rechargeable batteries via supplied plug-in charger, removal of the batteries not required. Dimensions: 190 x 90 x 55 mm. weight: 290 g. Note: Do not connect the plug-in charger to the voice amplifier when using standard batteries.