Product name: Intelligent digital display test pen Product model: B20 Frequency: 50~60Hz Power supply: 1.5V AAA * 2 Battery: 2 * AAA (battery not included in delivery) Flashlight: white LED light Digital display backlight screen: Dual color display screen: /slotted screwdriver: Zero-live wire distinction: NCV voltage sensing: LCD backlight screen: Electrical appliance on/off detection: AC voltage range: non-contact measurement: AC30V-1000V contact measurement: 11V-450V Energy-saving automatic shutdown: If there is no operation after the test pen is turned on, it automatically shut down after 3 minutes. Battery undervoltage indication: When the test pen is in use, if LO is displayed on the screen, it means that the battery power is insufficient to drive the test pen to work, and the battery needs to be replaced. Color: Black Material: ABS Package Contents: 1 * Electrical test pen (It requires 2 x AAA batteries, but they are not included in the delivery) 1 * English instruction manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.