They are black receivers. I was hoping to sell everything as a set since I no longer use it. Also, when using regular Alkaline batteries like Rayovac, it powers on right away no pushing needed. When using thicker rechargeable Eneloop batteries you need to really push hard to get the tray in since the rechargeables are slightly thicker. I will also post a photo of it powering on.
I'm uploading right now.