1.Chip:NRF51822 2.Broadcast Interval:1000ms 3.Communication distance: within 50m 4.Button battery model: CR2032 5.Battery capacity:240mAh Broadcast power: -95dB - 4dB (adjustable 1-9 gears) Product features: IP65 waterproof, dustproof (splash-proof, light rain, not soaking) Applications: Wearables Mobile phone accessories Beacons Rezence wireless charging monitoring PC peripherals Proximity/Alert sensors Consumer Electronics (CE) remote controls Smart Home Sports, fitness and healthcare sensors smart RF tags Intelligent domestic appliances Industrial and commercial sensors major minor Toys and electronic games size: 30 x 30 x 10mm Material: plastic colour: White Package Contents: 1 x NRF51822 Bluetooth module Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.