Category: Speed Cadence Sensor; Model:SD-581; What's in the box:1 Operation Manual; Activity: Fixed Gear Bike,  Recreational Cycling; Quantity:1; 
 Material: Molded ABS; 
 Width:5; Function: Heart Rate Monitors,  Ultra Light (UL),  Cycling,  Portable,  Waterproof; Length:5; Brand: Sun Ding; Shipping Weight:0.06; Net Weight:0.05; Listing Date:03/18/2019