Introducing the R1™ Percussion Device. Developed using feedback from elite and professional athletes, the R1 was designed with four key elements: compact and powerful, exceptionally quiet operation, over 7-hours of battery life, and built with the highest quality of materials. The R1™ operates with 40W of power (50W max power), has 4-speed settings, 4-unique attachment heads and is packaged in a beautiful, aircraft-grade aluminum anodized body for long lasting durability. Charging the Lithium Ion battery is accomplished with a USB-C charger (included). It looks just as good as it works and will be an asset in your recovery arsenal. Features: • Four speeds (1800rpm, 2200rpm, 2600rpm, 3200rpm)• 4 Attachment Heads• Premium USB-C charging• Long lasting, Lithium ion battery lasting over 7 hours• Aircraft-grade Anodized Aluminum body• 15-minute Self-Timing shutoff to preserve battery life.• Less than 3-hours full charging time. Specs: • Dimensions: 5.6” x 3.6” x 1.85” (14.2cm x 9.1cm x 4.7cm)• Weight: 1lb 4oz (0.57 kg)• Voltage: 11.1V• Power: 40W Rating (50W Max Power)• Battery: Li-ion 2200mAh 10.5V-12.6V• 7mm High Frequency Stroke• Adapter: USB-c