Screen display makes it easier to read data, and the buttons are easy to operate. The housing is made of high-quality ABS material, offering excellent heat and cold resistance, high strength, and good toughness. Suitable for detection tasks such as substation detection and mobile signal tower detection, and is lightweight and portable. Features mute and alarm modes, test and pause functions, and adjustable backlight on or off. Model: BR-9A Test range: Power density: 0–99.999 W/m² Electric field intensity: 0–999.99 V/m Magnetic field intensity: 0–99.999 µT Test accuracy: Power density: 0.001 W/m² Electric field intensity: 0.01 V/m Magnetic field intensity: 0.001 µT Frequency range: Power density: 50 MHz–5 GHz Electric field intensity: 20 Hz–100 MHz Magnetic field intensity: 20 Hz–1 MHz Battery: 3 x AA 1.5V battery or 3 x 1.2V rechargeable battery (not included) Charging: USB 5V 2A input Charging time: Approximately 4 hours Item weight: 100g / 3.5 oz Color: Blue Material: ABS Size: 105 x 70 x 30mm / 4.1 x 2.8 x 1.2 in Screen size: 57 x 43mm / 2.2 x 1.7 in Package Contents: 1 x Electromagnetic Radiation Detector 1 x User Manual Note: This device cannot test nuclear radiation. Package includes only the items listed above; other products are not included. Note: Lighting and display differences may cause slight variations in color between the image and the actual item. Measurement error allowance is +/- 1–3 cm.