OhMiBod Lumen by Kiiroo

Body-safe silicone with a cushioned, ridged surface
Four vibration patterns that can be run from the device itself
Free OhMiBod Remote app, including partner and long distance control
Links to other Kiiroo devices through the FeelConnect app
Club Vibe mode syncs the vibration to ambient sound
Light in the base gives a visual signal while it is running
USB rechargeable
Twelve month manufacturer's warranty

Material: body-safe silicone
Power: USB rechargeable
Control: buttons on the device, or the OhMiBod Remote app
Warranty: 12 months from the manufacturer
Dimensions and waterproof rating: not published by Kiiroo (confirm with supplier)

The app gives a much larger control surface than the buttons on the device, which may help where fine motor control, reach or vision makes small buttons difficult
Once it is in place, it can be operated entirely from a phone
A partner can take over the controls, from the same room or from elsewhere, which may help where adjusting settings independently is difficult

Wash with warm water and a mild soap or a water-based toy cleaner after every use, then dry fully before storing.
Kiiroo do not publish a waterproof rating for the Lumen, so keep water away from the charging point and do not submerge it (confirm with supplier).
Use a water-based lubricant. Silicone lubricant can damage a silicone surface over time.