Of all the emerging technologies tied to bitcoin, MEVU’s Wearable “bracelet” could be the niftiest device yet.

Tech startup MEVU has announced the first wearable bitcoin wallet that can complete microtransactions, usually under $20, by reading your movement.

MEVU’s proof-of-concept bracelet is powered by Coinbase’s wallet API. It can deliver small bitcoin amounts with a flick of the wrist. The device is primarily meant for tips and other small-value transactions.

Apurv Mishra, CEO and co-founder of MEVU, said the company’s wearable wallet is mainly for tipping, whether in BTC, altcoins (possibly litecoin and dogecoin), or even something else.

“If we use bitcoin or any other currency, if it has the facility for tipping, I think that’s what people would want,” Mishra told CoinDesk.

The idea for the device came about from Mishra’s fascination with community-based payments that are powered through software such as Dogetipbot.

Mishra and his team see microtransactions as a good fit for wearable wallets. Any amount larger than $20 would likely require greater security, including two-factor authentication using a mobile phone

The MEVU wristband is similar in form to the Nymi biometric wallet, but employs an advanced InvenSense motion sensor for its gesture functionality.