This product is based on the characteristics of small LED light power (current is less than 20MA, voltage is only 3.2V or less), the use of telephone lines redundant current-voltage, constant current regulator through scientific technology, direct-drive phone lights LED light, which play a role in lighting , but do not affect telephone use (including without prejudice to fax, Internet; part of the brightness of customer needs, without regard to telephone access, there are bright lights light phone, completely suitable for home lighting)!