Convenient buffer block: Convenient buffer block can be used to support the finger robot when there is no suitable position nearby. Custom operation: The finger robot can set the upper and lower distance, time and frequency on the APP. Fixed glue: is very sticky and not leave marks on the finger robot when torn off. Various striking heads: Five striking heads are rocker arm, ring arm, short straight arm, medium straight arm and long straight arm. Easy installation: The finger robot arm is installed by card slot, which is very convenient to install., Weight: 0.03086471668 Pounds, Manufacturer: Taviko