Dimensions: 4.88" x 2.38" x .95". Rechargeable. Hand warmer and power bank. Up to 9 hours of heat. 5200 MAH power lithium-ion battery bank. Charges USB compatible devices. Battery and heat indicator lights. Up to 120F operating temperature. One or two-sided heat output. Six heat settings. Input: 5V2A micro USB. Output: 5V2A USB. Lanyard and charging cord included. Black. Boxed with hanging tab.