This module Bluetooth 4.0 BLE (Bluetooth Low Energy) is a low-power module that incorporates the CC2540 transceiver chip from Texas Instruments. The chip integrates an RF GFSK transceiver 1Mbps and a microcontroller 8051 for better coverage and optimal data transmission.
Compatible with MCU as Arduino with which communicates via standard interface UART (TTL).
Supply voltage: 2.0 - 3.6 V
Frequency: 2402 - 2480 MHz
Frequency error: +/- 10 KHz
Power transmission: +4.0 dBm
1 Current consumption: 32 mA (connection)
2 Current consumption: 0.69 mA (BLE)
Current in standby: 0.4 uA
Current reception: 0.65 mA (BLE)
Transmission Speed: 9.6 Kbps
Roof antenna: 50 m
Dimensions: 13.7 x 17.4 x 1.9 mm
For more info download datasheet.