Keyde BTB140 Bluetooth E-Bike Button — Wireless Motor Level Controller

Upgrade your DIY electric bike with the Keyde BTB140 Bluetooth Wireless Button — a solar-charged, handlebar-mounted controller that lets you adjust motor assist levels on the fly. Auto-pairs with your Keyde motor, syncs real-time data with the Keyde App and BTD260 display, and runs up to 3 years on standby. No wiring, no hassle — just smarter riding. Wireless Bluetooth control — no wiring required Solar charging for extended use Up to 3 years standby battery life Auto-connects when near the motor Automatic sleep & press-to-wake function Real-time APP data synchronization Battery capacity: 140mAh replaceable battery Fits 22.2mm & 31.8mm handlebars Notice: Only compatible with Keyde wireless motors