Vaporizer customer service system (mobile app) will provide below function to support our customer and business: For external customer (Nurse): - System will support customer to scan QR code of vaporizer to get the vaporizer id and raise a vaporizer problem to sales rep. For internal user (Sales Rep): - Received the notification and confirm the return request. - System will base on the request to apply a return request from vaporizer approval system (local system) to get back the vaporizer. - Sales rep can create a new vaporizer request from the system and the system will apply a new request from vaporizer approval system (local system) to deliver the new vaporizer to customer.