Multifunctional High-Frequency Electromagnetic Field Generator This device generates a high-frequency electromagnetic field. When placed near an energy-saving lamp, it induces a current that may cause the lamp to illuminate. It can also be used to test the responsiveness of certain electronic locks. Features: - Compact and portable design for easy handling - Designed for testing lighting devices and electronic lock functionality - Interchangeable emitting heads with adjustable triode configuration - Adjustable coil for customized field intensity - High-frequency output with consistent performance - Ventilated housing for efficient heat dissipation - Stable power delivery with durable internal components - Built-in voltage indicator for battery status monitoring Specifications: - Plug Type: US plug or EU plug (optional) - Color Options: Black or white (optional) - Housing Material: ABS plastic - Battery: 3.7V, 250mAh rechargeable lithium-ion - Device Dimensions: 80 × 43 × 24 mm (3.1 × 1.7 × 0.9 in) - Package Dimensions: 110 × 105 × 65 mm (4.3 × 4.1 × 2.6 in) - Package Weight: 182 g (6.4 oz) Package Includes: - 1 × Electromagnetic Field Generator - 1 × Power Cable - 1 × User Manual - 2 × Replacement Coils - 1 × Triode Component