Terms & Conditions

Legal Disclaimer:

The seller expressly disclaims all warranties, either expressed or implied, including the warranty of merchantability or fitness for a particular purpose. This disclaimer by the seller does not affect the terms of any manufacturer’s warranty, if applicable. Title to goods purchased is retained by the seller until goods are paid for in full by the purchaser, at which time title passes to the purchaser. If goods are purchased for export purposes, the purchaser must obtain certain export documentation from the Federal Government before shipping to a foreign country. Additionally, manufacturer warranties for exported goods may vary or be null and void. Any and all liability is limited to the products purchased.

Terms & Policies:

Information about Us:

This Website is operated by KENTINO s.r.o., whose main webpage is www.kentino.com, along with additional websites such as www.teslassories.eu, and www.pcpraha.cz. We are registered in the Czech Republic in Prague under company numbers 19989563 and 05066743, with VAT numbers CZ05066743 and CZ19989563. Our registered office is at Rybna 20 and Cestmirova 25, 11000 Prague, Czech Republic. Established in 2012, we previously operated under different trading names before updating to Kentino s.r.o. in 2016. Our complete address is: Kentino s.r.o., Čestmírova 1358/25, 140 00 Praha 4 - Nusle, Czechia.

Our Products & Descriptions:

The images and descriptions of products on our Site are for illustrative purposes only. While we make every effort to display accurate colors and cosmetic conditions, variations may occur. Specifications provided on our site reflect those provided by the manufacturer. Customers are encouraged to verify compatibility and suitability before ordering. We reserve the right to make minor modifications to specifications, designs, or materials without notice.

Consumer Rights:

As a consumer, you may cancel a contract within fourteen days of receiving the products, in accordance with our refunds policy. For defective, damaged, or not as described items, we reserve the right to repair, replace, or refund the item. These terms and conditions do not affect consumers' statutory rights as governed by current legislation.

Dispatch and Delivery:

We determine the delivery method based on the size of the products. Delivery times may vary, and while we make every effort to meet estimated delivery dates, time of delivery is not of the essence. Delivery is completed upon delivery to the specified address, and ownership of products transfers upon full payment receipt. We do not deliver until clear funds are received.

Import Duty:

Products may be subject to import duties and taxes when delivered outside the Czech Republic or the European Union. Customers are responsible for payment of these charges and compliance with applicable laws and regulations.

Price and Payment:

Prices are subject to change without notice. While we strive for accuracy, errors may occur, and we reserve the right to refuse or cancel orders listed at incorrect prices. Payment for products must be made by credit, debit card, PayPal, or Bank Transfer.

Law and Jurisdiction:

Contracts for purchase of Products and any disputes arising from them are governed by Czech law and subject to the non-exclusive jurisdiction of Czech Republic courts.

Rights & Restrictions:

Members must be at least 18 years old. Access to the online course is non-exclusive and subject to maintenance by the Company. Videos in the course are provided via stream and not downloadable. By accessing the course, members agree to these terms.


Its design is true to the principles that Satoshi incorporated into Bitcoin – proof-of-work mining, an isolated state created by UTXO, a deflationary monetary policy, no pre-mining and no central control. Kaspa is unique in its ability to support a high frequency of blocks without affecting the level of security offered by the most secure proof-of-work environments. The current Kaspa mainnet operates at one block per second. Following the ongoing Rust rewrite, the core developers aim to significantly increase the number of blocks per second, making it attractive for smart contract and DeFi (decentralized finance) development.


Traditional cryptocurrencies suffer from a trade-off between security, scalability, and decentralization: decentralized cryptocurrencies must limit the rate at which blocks are created to reduce the number of "orphans," which are blocks created off-chain during the time a block is propagating through the network. A high number of orphans reduces the effectiveness of the PoW (Proof of Work) network and thus weakens its defense against attacks by malicious participants. To resolve this trade-off, the Kaspa consensus layer uses the GhostDAG protocol, a Proof of Work consensus protocol that generalizes the Nakamoto chain to a directed acyclic block graph (blockDAG). GhostDAG incorporates "orphaned" blocks into the chain by creating a blockDAG, and then uses a new hungry algorithm to organize blocks by favoring well-connected, honest blocks, quickly and with high probability. GhostDAG allows Kaspa to bypass traditional blockchain compromises, increasing the speed of block creation by several orders of magnitude and maintaining theoretical Bitcoin-level security.

The result is a cryptocurrency that is backed by 51% security, has a large number of miners/nodes, and achieves throughput of the order of one block per second. This differs from existing cryptocurrencies, which inevitably sacrifice a small number of validating nodes or a lower security BFT (33% threshold required for attacks by malicious participants on the network).

Quick confirmations

The slow block creation rate of traditional cryptocurrencies means slow confirmations, i.e. the time it takes for a transaction to be published on the blockchain. The Kaspa consensus layer supports fast confirmations in the order of seconds - fast first confirmation, which allows use in cases where immediate proof of publication (but not immediate irreversibility) is needed, such as e-commerce.

High throughput

The slow block creation speed of traditional cryptocurrencies also means low transaction throughput. By using GhostDAG, Kaspa's consensus layer removes security as a bottleneck for high throughput, allowing speed and block sizes to grow to a level that the network can handle. Kaspa also optimizes data transmission costs and network infrastructure for high throughput.

Decentralization of mining

The slow block creation rate of traditional cryptocurrencies also means high variability in mining income (ie irregular mining rewards due to the difficulty of finding a block), which incentivizes miners to join larger and larger mining pools – which combine computing power and distribute smaller, more regular rewards participants – as the network grows and block difficulty increases. This centralizes the power of the consensus in the hands of a few mining pool managers. The fast speed of creating blocks in the Kaspa consensus layer reduces the volatility of mining income, which reduces the incentive to join mining pools and contributes to the decentralization of mining.