Hollyland LARK M1 DUO 2-Person Wireless Microphone System (2.4 GHz, White) - Manual (Page 15)

EN-15
Note: The frequency range and wireless transmit power of the device vary based on the
regulations of different countries and regions.
Safety Precautions
Do not place the product near or inside heating devices (including but not limited to
microwave ovens, induction cookers, electric ovens, electric heaters, pressure cookers,
water heaters, gas stoves) to prevent the battery from overheating and exploding.
Never use non-original charging cases, cables, and batteries with the product.
The use of non-original spare parts may cause electric shock, fire, explosion, or other
dangers.