... battery build-in. Speaker build-in test box 2.5" TFT LCD Video Audio CCTV Tester. Video Test, audio test. Lithium battery ... and get the labor cost down.Main Features 2.5" TFT-LCD , 960(H)×240(V)resolution. Video Test --- the video signal ... Specification ModelCCTV tester JE-BT250Signal modeNTSC/PAL Auto suitableDisplay2.5" TFT LCD Screen, 960x 240 resolutionVideo Input 1 X BNC 1.0Vp ...