The connections on the back center of the panel have a red and black pair stenciled 5v / red lead and din/ black. is this stenciling wrong?

The center connection on my panel is also marked that way. The Din on the center connection is actually gnd or 0v. It is connected to the gnd wires on the ends of the panel. (you can verify this with an ohmmeter) It is best to apply 5v and gnd to all three sets of wires to avoid voltage drops across the panel.

What else do I need to operate this panel

Well if this is your first time to operate this LED panel , you can use the K-1000C controller , the DC5V10A power supply . You can use the K1000C to program a scrolling test, photo , some chasing lighting effect . K-1000C teaching video https://www.youtube.com/watch?v=sD8moscZOVU&t=20s There are 4 parts . If you are a beginner , please watch all of them . Part 1(start time 00:05-03:12) : This part I teach you how to connect the power supply , controller and the LED strip . It is also used to check the connection before you program a file for the project . Part 2(start time 03:12-18:16) : I will teach you how to program a lighting effect for you WS2812B 16X16 LED matrix panel . It is the same way to program a file for other addressable panels. Part 3(start time 18:17-25:07): I will teach you how to program a lighting effect a lighting effect for WS2812B LED strip . When you learn this , you can program a lighting effect for all the smart IC led strip . Part 4(start time 25:08-36:05) : I will teach you how to connect two K1000C controller to control 3000 Pixels Panel . We call it Cascade synchronization US amazon link K-1000C : https://www.amazon.com/dp/B06XJ1J915 DC5V10A power supply : https://www.amazon.com/dp/B01D8FM71S Anyother question , you can contact us support@btf-lighting.com

Do you have any versions that do not bend?

This is flexible PCB board , we can make it unbendable . It depends on how many do you want ? You can contact us support@btf-lighting.com

Can this be operated by battery?

this must be DC5V . In theory is possible, if your battery is DC5V .However, it is difficult to guarantee working hours , it deepends on your battery capacity. We recommand the power adapter DC5V10A for this product

Color	Black
Brand	BTF-LIGHTING
Indoor/Outdoor Usage	Indoor
Special Feature	Chasing Color, Individually Addressable DIY, LED Matrix, Pure Gold Wire, WS2812B IC Chip
Light Source Type	LED
Power Source	DC
Light Color	RGB
Theme	Christmas
Occasion	Indoor
Style	Modern
Material	Plastic
Controller Type	Voice Control
Number of Light Sources	256
Voltage	5 Volts
Wattage	50 watts
Included Components	3 PIN male connector
Item Weight	0.1 Kilograms
Number of Items	1
Item dimensions L x W x H	7.88 x 7.88 x 0.98 inches
Control Method	App
Water Resistance Level	Not Water Resistant
UPC	602938070409
Manufacturer	BTF-LIGHTING Technology Co., Limited
Part Number	WS2812B-16x16
Item Weight	3.52 ounces
Product Dimensions	7.88 x 7.88 x 0.98 inches
Item model number	WS2812B-16x16
Is Discontinued By Manufacturer	No
Size	16X16 256 LEDs
Shape	Matrix
Item Package Quantity	1
Switch Style	Controller
Special Features	Chasing Color, Individually Addressable DIY, LED Matrix, Pure Gold Wire, WS2812B IC Chip
Usage	Indoor use only
Batteries Included?	No
Batteries Required?	No
Warranty Description	Indoor use only.

BTF-LIGHTING WS2812B RGB 5050SMD Individually Addressable Digital 16x16 256 Pixels 6.3in x 6.3in LED Matrix Flexible FPCB Dream Full Color Works with SP802E Controller Image Video Text Display DC5V

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