Opticlar 28d Lens in Soft Pouch (optional transilluminator) Transilluminator:Not required E lithium Ion rechargeable handle E lithium Ion rechargeable handle Features include• Compact size 67 x 93 x 21mm weighs 92g (excluding 1 AA battery)• Large LCD screen 48 x 28 mm• Patient event button• Low running costs uses 1 AA Alkaline or rechargeable battery • Records 24 hours or up to 168 hrs (7 days) of ECG in internal memory• Uses Micro USB cable • Automatic beat analysis and classification of abnormal and normal beats • Heart Rate Variability analysis Product Properties Fits to Keeler and Heine handles by using an adaptor