TS-FT002 Multifunctional Ultrasonic Electronic Water Tank Level Gauge With Indoor Temperature Thermometer Clock Display Water Level GaugeFeatures: 1. Measuring liquid depth2. 10-level depth indicator chart3. Maximumminimum record of liquid surface depth4. High and low value alarm of liquid level depth5. Low liquid level alarm6. Room temperature7. Ambient temperature of liquid8. Alarm clock function9. Can stand on desktop or wallParameter:1. Indoor temperature range: 0~60 degrees Celsius2. The temperature range around the liquid: -40~60 degrees Celsius3. Temperature accuracy: +-1 degrees Celsius4. Liquid depth range: 0 ~ 15m5. Display accuracy: 0.01m6. Measurement accuracy: +-0.03M7. Transmission frequency: 433MHZ8. Launch range: 100m (open area)9. Transmitter frequency: send once every 30 seconds when the liquid level changes, and once every 3 minutes when the liquid level does not change10. Power supply: Receiver: 2xAA batteries (not included); Transmitter: 6XAAA batteries (not included)11. Battery life: 1 year12. Size: Receiver: 108X94X27mm; Transmitter: 97X68X152mm13. Display screen: 66X45mm(3.3 inch)