SteriPEN Aqua UV Water PurifierDescription:SteriPEN Aqua makes water safe to drink in as little as 48 seconds. With 3,000 treatments, you'll feel secure for years to come. Aqua pure. Aqua safe. Aqua sure.Features: Treatment Time: 48 seconds for 1/2 litre / 90 seconds for 1 litreUsage: Up to 150 litres per charge (lithium disposable batteries)UV Lamp Life: ,000 treatmentsBatteries: Requires 4 AA batteries - alkaline, lithium or Rechargeable NiMH (not included) Specifications:Dimensions: 18.5cm x 4.3cm x 4.3cmWeight: 178g (including batteries)