Characteristics summary: Type: AED Pro non-rechargeable Lithium Battery pack. Operating Time: 300 Shocks Warranty: 5 years Type: AED Pro Rechargeable Lithium Battery pack, with accessories. Operating Time: 400 Shocks Warranty: 3 months before recharge or retest AUTOMATIC SELF-TESTS: Default checks every 7 days. Monthly full-energy test (120J) Self-Test Content: Battery capacity, electrode connection, electrocardiogram and charge/discharge circuits, microprocessor hardware and software, CPR circuitry and CPR-D sensor, and audio. Internal memory: With audio recording enabled, 20 minutes of ECG and operator and device actions; Without audio recording, 7 hours of ECG data or up to 4 patient records. Dimensions (H x D x W): 7.6cm x 23.5cm x 23.9cm ( 3in x 9.2in x 9.4in ) Weight: 2.9kg (6.5 lb) PADS NOT INCLUDED When ordered, the customer will be contacted about the details of the purchase.