Variable Voltage: Two (2) Button Click Mode 1 (Green) - 3.4V Mode 2 (Blue) - 3.7V Mode 3 (White) - 4.0V Battery: Built-in 350mAh Size: 39.5mm x 20mm x 62.5mm Charging: Type-C Pre-Heat Function: No Display: LED Lights Four (4) Lights - 100% to 76% Three (3) Lights - 75% to 51% Two (2) Lights - 50% to 26% One (1) Light - 25% to 1% Thread: 510 Built-in Lanyard Clip Includes: 1 x Lookah Guitar Device 1 x User Manual