CTIME Rubber Strap Waterproof Swimming Men Wristwatches Color Black Blue Multifunction: Week,Date,Chronograph,And two time zone; Which is very suitable for differents kinds of sports Waterproof: 5ATM=50M water resistant; Which is suitable for washing,rain or swimming (please do not touch hot water or press any button under water) Material: Confortable Rubber Wristband; Which is very smooth and light on hand Design: Combine of fashion and sports; Which is popular in sports lovers and fashion people Buckle: Pin buckle; Which is beautiful and easy to operate