U-WAVE fit Bluetooth, Buzzer Type Wireless Transmitter for Micrometer/Indicator 264-627Wireless Transmitter for Micrometer Features Wireless communication protocol: Bluetooh 4. 2 Low Energy Modulation method: FH SS (Frequency Hopping Spread Spectrum Method)) Type: U WAVE TMB (U WAVE fit Bluetooth) Data reception indication: Buzzer and LED (green, red, orange) Communication distance: Approx. 16 m (within visible range), 10 m (factory environment) Power supply: Battery CR2032 x 1 pcs. Communication with measuring tool: Digimatic (6