The buy in early price is based on the ICO starting rate in tier 1 on January 20th at 0,80 USD per CNTZ token. 6 million tokens have been made available during the Early Bird out of totally 16 million tokens available.

Buying 1 BTC worth of CNTZ tokens will give you 5% extra tokens on top as a special Early Bird bonus
Buying 20 BTC worth of CNTZ tokens will give you 20% extra tokens on top as a special Early Bird bonus
Buying 50 BTC worth of CNTZ tokens will give you 50% extra tokens on top as a special Early Bird bonus

Any of the above mentioned orders will be sent to the accounts respectively with the added bonus on top in one full transfer. So your order will be multiplied either with 1,05: 1,20 or 1,50.