I have already explained about OM in a separate article titled  http://www.manblunder.com/articlesview/understanding-om 1) Kāma bīja - klīṁ क्लींConsists of ka + la + ī + bindu (dot)Ka represents Kriṣṇa or desire; la represents Indra: ī represents contentment and satisfaction and the bindu represents comfort by dispelling pains and miseries This is the reason why bindu is used in all the mantras. Without bindu, a bīja is not complete. Thus kāmabīja fulfils all material desires. Every bīja has inherent nāda (subtle sound), which subtly causes the sound and this nāda is the power or Grace of Śakti, which is to be visualized in the form of light to derive the full effect of a bīja2) Kāli bīja - krīṁ क्रींConsists of ka + ra + ī + bindu (dot)In this bīja, ka represents Kāli; la represents Brahmā; ī represents annihilation of miseries. This bīja, due to the power of Brahmā (not Brahman; here it refers to the god of creation), Kāli removes all pains.3) Bhairava bīja - hūṁ हूं (this is also known as kūrca bīja, subtly referring to ājñāa cakra)Consists of ha + ū + binduHa represents Śiva; ū represents Bhairava. Bindu refers to removal of sufferings. This bīja is capable of removing ill effects evil forces. This acts as a protective bīja. 4) The bījā kroṁ (क्रों) is formed out of three alphabets –ka + ra + ma with a bindu. The alphabet ka stands for joy and fame. The alphabet ra is considered as powerful as it is the bīja of agni, the fire. Any mantra with ra bestows supernatural powers. The alphabet ma stands for comforts in the present and future births. The repeated chanting of kroṁ will give all-round prosperity and happiness.This is explained here http://www.manblunder.com/articlesview/lalitha-sahasranamam-66-67-I do not have any idea about sphroṁ. I will let you know about this latter.

Raviji,in the mantra Bijakshara's are om - Pranavamklīṁ - Kamabijamkrīṁ- Kali Bijamhūṁ - Bhairava/Kavacha Bijamkroṁ - Krodhisha bijasphroṁ - I don't know about this, can you please give me some hint about this? which deity or sakthi governing this Bija mantra

Thank you Ravi,Will add the Mūla mantra and the kavacham in my daily sadhana.Will wait for you to share some more treasures from the Mahākālasaṁhitā.

If you are talking about Mūla mantra, it will give protection and material benefits. If we look at this mantra from the point of view of kavacham, then Mūla mantra should also give immense benefits. Recitation of Mūla mantra adds power to the recitation of kavacham. There are nine powerful Kāli mantras in Mahākālasaṁhitā. I will publish them soon.

Mūla mantra should always be recited first. Number of recitations is not prescribed. The Scripture says that mere listening to this mantra will give siddhi. But according to me, at least 10,000 mūla mantra-s should be recited to see some benefits. As far as kavacham is concerned, it is given in the article itself.

What does this mantra give?Spiritual benefits or protection and material benefits?Thank you for sharing this wonderful and powerful mantra with us....

Should we recite this mantra before or after reciting the Kavacham and how many times to recite to get mantra siddhi?Is the KAMAKALAKALI TRILOKYAMOHANA KAVACHAM a siddha mantra which requires only a single recitation to yield benefits or does one have to do it at least 50,000 japas to get result?Thank you again for sharing one of the most secret Kavacham and the mūla mantraḥ.

कामकलाकालि मूल मन्त्रः Kāmakalākāli mūla mantraḥॐ क्लीं क्रीं हूं क्रों स्फ्रों कामकलाकालि स्फ्रों क्रों हूं क्रीं क्लीं स्वाहा।om klīṁ krīṁ hūṁ kroṁ sphroṁ kāmakalākāli sphroṁ kroṁ hūṁ krīṁ klīṁ svāhā |It is to be noted that klīṁ, krīṁ, hūṁ, kroṁ and sphroṁ in the beginning are placed in the reverse order after kāmakalākāli. This is generally known as sampuṭaka (encasing), which makes a mantra extremely powerful.

There is nothing much to give meaning for this mantra, as the highest potency is conferred only by the bīja-s, some of them of difficult to pronounce. Word pātu is frequently repeated here and pāta means protection. Thirty four Devi-s mentioned here protect different body parts. Thanks for your good words and prayers. All this is possible only due to HER GRACE.

Thank you very much MR. Ravi, We expect your valuable wisdom of explanation on Kamakala Kali, if you can please give us explanation of Pada artha of entire Kavacha!for your great service that you are doing for the Sadaka's and the humanity, we pray to mother Kali to give you the longevity, strength and good health to give us the nectar of wisdom & knowledge of all the Tantra, Veda sashtra in this manner!With Love