Dimensions: 4.88″ x 2.38″ x 0.95″. Weight: 5.52oz. 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. Clam packed.