4 over 2 (Emisar, Noctigon)

Lights from Hank Wang (Emisar and Noctigon brands) typically have flashing pads in two rows: 4 pins over 2 pins. These lights typically use a chip such as the attiny85 or attiny1634.

Models using this interface include pretty much every model from these brands over the last few years, such as the popular D4v2, D4Sv2, KR4, KR1, and many others.

4 over 2 Flashing Pads (Hank Style)

One or more of the pads may include an alignment hole to help guide pogo pins on the probe.

4 over 2 Flashing Pads on an Emisar D4v2