... CCTV Security tester It can be used for displaying video, controlling PTZ, generating images, capturing data of RS485 and tes Security CCTV tester2.5 ... Ion Polymer Batteries(3.7V DC2800mAh), more reliable, and work 9 hours SpecificationMODELST89B-4 CCTV Security TesterLCD ... AdapterDC5V, 2ABattery1 pcs Lithium Ion Polymer Batteries, 3.7V DC2800mAhRechargeable3-4 hours recharging time, work for ...