Feature: 【Clock display】Ultrasonic mosquito repellent bracelet with clock display, press and hold the power/clock setting button for three seconds, the screen clock flashes, set the time first, press the clock setting button to set the time, press the power button to confirm the clock setting Press the button , after confirmation, the minute setting will be automatically switched. After the minute setting, press the power button to confirm, and the clock setting will be completed. The clock display screen will automatically turn off after 10 seconds of inactivity. 【Easy to use】Press the mosquito killer button once to turn on the first gear, press press it again for the second gear, press it three times for the third gear, suitable for sleeping use, and press it four times to turn off the mosquito repellent function. , such as seaside, park, camping, mountaineering, fishing, etc., it can block mosquito bites. Specification: Product Name: Ultrasonic Mosquito Killer Bracelet Product Size: As Shown Display Mode: Digital Display Method dump : Micro USB 5V/1A Operating Frequency: 34HZ-70KHZ Battery Capacity: 90 mAH Charging time: about 30 minutes Endurance working time: 130 hours, seven days of continuous work at full load. Standby up to 150 days Package Included: 1* Ultrasonic Mosquito Repellent Bracelet 1 * USB Cable 1* Instruction Manual Note: The data is manual measurement, please allow 1-77cm error, due to differences between light and screen, there will be a certain color difference, the specific received in kind prevail.