... the visual fatigue.3. Built-in large capacity rechargeable lithium battery, so that veterinarians can no electricity environment directly ... rectal probe, mouse, SP-2 power adapter, HYLB-523 lithium battery, metal SuitcasePower Supply1.Power adapter or built-in battery2 ... ..2Built-in rechargeable lithium battery. Continuous operation for more than 2 hours3..Both ...