Dual Model Virtual Wall Barrier Compatible with iRobot Roomba i, e, s, 900, 800, 700, 600 and 500 Series Robots, Replace Part Number: 4636429.(2 Pack) : Amazon.in: Home & Kitchen
Roomba Repair [splitbrain.org]
iRobot Authentic Parts Dual Mode Virtual Wall Barrier Compatible with Roomba 600/700/800/900/e/i/s Series Robots (1 Pack) : Amazon.in: Home & Kitchen