Handheld Tesla Coil Gun in Blue Key benefits Portable voltage arc generator for demonstration and hobby applications. Builtin digital voltmeter on the control panel for realtime output monitoring. Four detachable lithium batteries installed by default for a combined capacity of 2900mAh, enabling extended use and easy replacement. Includes a 110V240V universal charger for worldwide compatibility. Main features Color: Blue. Handheld form factor for easy operation and transport. Control panel with digital voltmeter and a power knob for precise adjustment. Arc trigger switch for straightforward arc generation. Detachable battery design simplifies maintenance and battery replacement. Supplied universal charger supports input from 110V to 240V. How to assemble and operate 1. Align the nut at the bottom of the coil with the screw on the host and tighten by rotating until secure. 2. Turn the power knob on the panel completely clockwise. 3. Press the arc trigger switch to generate an arc. Charging instructions Insert the original charger into the charging plug, then plug the DC connector into the charging port on the host. When the indicator light on the charging head turns red, charging is in progress. When the indicator light changes from red to green, charging is complete. Safety and handling The arc produced reaches temperatures and may ignite flammable or explosive materials. Do not place or use the device near flammable or explosive storage or inside warehouses storing such materials. Operation generates electric field interference that may affect nearby electronic devices. Take appropriate distance from sensitive equipment when operating. Use only the supplied charger and the specified battery configuration. Practical applications Educational demonstrations of voltage discharge and basic plasma phenomena in controlled classroom or lab settings. Hobbyist experiments and visual demonstrations for makers and electronics enthusiasts. Photography and film effects where controlled visible arcs are required, used at safe distances and with appropriate precautions. Technical summary Product type: Handheld Tesla coil gun. Color: Blue. Batteries: 4 detachable lithium batteries installed by default, total capacity 2900mAh. Charger: 110V240V universal charger included. Controls: Digital voltmeter, power knob, and arc trigger switch. This description provides the product functions, setup steps, charging procedure, and safety notes needed to operate the handheld Tesla coil gun safely and effectively.