specifications:One main unit + three handles Anesthesia Video Laryngoscope can be used to provoke patients' glottis and expose epiglottis, guide medical staff to accurately intubate airway for anesthesia or first aid, and also for oral inspection and treatment. Safety 1. Medical Grade Alloy with high flexure strength. 2. Upper connector design for more stable use. 3. Optional disposable version to avoid cross infection 4. Passing waterproof grade IPX7 testing Cost Effective 1. Rechargeable lithium battery 2. High-cost-performance blade 3. 3-in-1 system integration Intelligent 1. Anti-fog lens with power on used 2. Omnidirectional rotation screen design for better sight 3. One button operation for image, recording and review 4. Automatic coverage of full record 5. Low battery alarm notice.