BZ-NT20FFNPN, Light on Dark on Selectable, Front, Side SensingBZ-NT20FUNPN, Light on Dark on Selectable, Top SensingBZ-PN20FFPNP, Light on, Front, Side SensingBZ-PN20FUPNP, Light on, Top SensingBZ-NT20FFNPN, Light on Dark on Selectable, Front, Side SensingBZ-NT20FUNPN, Light on Dark on Selectable, Top SensingBZ-PN20FFPNP, Light on, Front, Side SensingBZ-PN20FUPNP, Light on, Top Sensing