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  Material: ABS Size: Approx. 5x5x0.3cm/1.97x197x0.12inch Rated operational voltage: DC +5V Working Temperature: -20-85℃ Storage Temperature: -40-125℃ When the power is turned on, the green LED on the HW-225 lights up Charge the center of the back of the HW-225 module with the wireless charging function on the back center of the phone (note: the positional offset of the phone placed on the module coil will affect the charging effect), and the red on the HW-225 module during charging. The light LED will illuminate and the green LED will be off After charging is completed, the red LED is off and the green LED is lit The HW-225 wireless charging module has a foreign object detection function. When there is a metal foreign object on the transmitting coil of the module, the red LED and the green LED flash, after the metal foreign object is removed, the red LED is extinguished, and the green LED is lit. The limit operating voltage of this product cannot exceed 5.5V DC. Standard: Qi Wireless Charging Standard Standby power: average power is less than 50 mW Conversion efficiency: greater than 73% Transmission Distance: Maximum 10 mm. Recommended Transceiver Distance 2 mm~4 mm Input voltage: DC4.3V~5.5V/1.5~2A, alarm and stop charging in this voltage range Output voltage: 5V±0.1V Charging current: 500mAh - 1000mAh Charging power: up to 5W Overtemperature protection: When the temperature is higher than 60℃ It will automatically stop charging for one minute, then lower the temperature, and it will recharge. Overcurrent protection: When the current exceeds 1.5A, it will automatically stop charging.