... transmitting channel testingl PTZ controller FEATURES: 2.8" TFT-LCD CCTV CamTester cctv l 2.8"TFT-LCD , 960(H)×240(V)resolution. ... -D, SAMSUNG etc.l Lithium Ion Polymer Battery (3.7V DC3000mAh). The device employsadvanced power control and protection ... controlling devicePOWERPower AdapterDC5V, 2ABatteryBuilt-in 3.7V Lithium polymer battery ,3000mAh RechargeableAfter charging 3-4 hour, working time lasts ...