Specifications Signal transmitter material:ABSSize:66 x 38 x 11.7mmSignal transmitter weight:20gStrap weight:30gStrap size:100cm x 2.9cmStrap material: Medical Polyester (80%Nylon and 20% Spandex)Signal transmitting distance:50mWaterproof level:IP x 7Cruising duration:800 hoursTransmission technology: Blueteeth 4.0Battery:CR2032 coin.Package list: 1* Transmitter Device1 x Adjustable Elastic StrapPackage Weight: 0.166kg (0.37lb.)Package Size: 20cm x 15cm x 15cm (7.87in x 5.91in x 5.91in)...