Feature: 1. ABS Material: Ozone detector is made of high strength ABS material, splash proof, dust proof and explosion proof. 2. LCD Indication: LCD indicates the time and status of alarm, fault and low voltage, LCD indicates, sounds and vibrates. 3. Complete Functions: Triple alarm mode (sound, light, vibration) is not easy to ignore, high security, durable standby, responsive. 4. Back Clip and Screen Display: Metal back clip is used, and the buckle is tight to prevent falling off. 1.7 inch backlight HD LCD screen display. 5. Small and Delicate: Small in size, light in weight, easy to carry, will not increase your burden, can bring you more convenience. Specification: Item Type: Ozone Detector Product Material: ABS Color: As Pictures Shown Weight: Approx. 820g / 28.9oz Measurement Object: Ozone Indication Mode: Sound, Light and Vibration Working Environment: Temperature -10°C ~ +55°C; Humidity <95% RH (Non Condensing) Accuracy: ≤± 5% F.S Charging Time: 4-6 Hours Standby Time: More Than 8 Hours Continuous Measuring Range: 0-20PPM Resolution: 0.1PPM Alarm Point: Low 2, High 5 PPM Power Supply: USB 5V Product Size (Without Back Clip): Approx. 11x6x3cm / 4.3x2.4x1.2in Battery (Shipped with Built in Battery): Model 803450, Polymer Battery, 1500mAh. Package List: 1 x Host 1 x Storage Box 1 x USB Cable 1 x Manual1 x Accessory 1 x Storage Rope