Sadly our mom passed away 2 days after having the stair lift installed on October 1st 2018. 2 SRE-3000 Elan straight stair lift with power seat option. SN18080330642 & SN18080330637 Includes two wireless remote controls and battery charger this is for staircase leading from bottom to middle landing and from middle landing to upper landing, both are right hand application.