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roll a call - The outer casing of the device is made up of Water proof Fabric. These fabrics are casings with outer coating of PVC or PU. These are also bad conductor of electricity. Hence this device will exactly give you a feel of handkerchief.
Hence Roll a Call is a device with following features :
1. Fabric Outer Casing
2. OLED based so thinner than you ever thought
3. Multi screen hence independent features