Rechargeable ultrasonic mosquito repeller wristband. repels mosquitoes using high-frequency waves with a 2 m² coverage. for adults or children over 8 years old. touch switch and 7 ultrasonic frequencies. power consumption 0.25 w. 3.7 v 75 mah lithium polymer battery. includes 5v 50 ma usb cable. charges in 3h with an approximate run time of 144 h. led operating indicator. made of silicone and abs. no chemicals, pesticides, or odors. ipx4. color green