Battery: 3 * AA 1.5V battery or 3 * 1.2V rechargeable battery (not included) Charging: USB 5V 2A input Charging time: or equal to 4 hours GALA Test range: Power density: 0-99.999w/c Electric field intensity: 0-999.99v/m Magnetic field intensity: 0-99.999T Test accuracy: Power density: 0.001w/c Electric field intensity: 0.01v/m Magnetic field intensity: 0.001T Frequency range: Power density: 50MHz-5GHz Electric field intensity: 20Hz-100MHz Magnetic field intensity: 20Hz-1MHz size: Item size: 105 x 70 x 30mm / 4.1 x 2.8 x 1.2in Screen size: 57 x 43mm / 2.2 x 1.7in Note: Nuclear radiation cannot be tested Material: ABS colour: As shown Package Contents: 1 x Handheld Tester 1 x English 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.