A compact electric horn delivering a loud 125dB alert for safer commuting through busy streets and mixed pedestrian-cyclist paths. With a built-in motion-sensing alarm and tool-free strap installation. - 125dB loud electronic horn for clear, effective alerts - Motion-sensing anti-theft alarm function - USB-C rechargeable with built-in 200mAh lithium battery - IPX5 water resistance rating - Tool-free installation with elastic straps and anti-slip pad Size 60 × 38 mm (~2.36 × 1.50 in) Compatibility All Velotric Ebike Models